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A German town built a granary atop its Jewish cemetery. Now the bones are yielding insights about Ashkenazi DNA.
BERLIN (JTA) – The city of Erfurt in central Germany is home to an impeccably restored medieval synagogue made possible because local Jews had been expelled long before the Nazis began their campaign to destroy Jewish sites.
Now, Erfurt’s long-hidden Jewish past is again offering new insights — this time about the genetic history of Ashkenazi Jews.
Human remains from a medieval Jewish cemetery in Erfurt have allowed what researchers say is the largest ancient Jewish DNA study to date. Conducted without disinterring any remains, in keeping with Jewish law, the study published Wednesday in the scientific journal Cell found that Erfurt’s medieval Jewish community was more genetically diverse than their modern-day cousins, and carried many of the same Jewish genetic diseases — such as Tay Sachs and cystic fibrosis — that affect Ashkenazi Jews today.
“There have been many previous DNA studies, but not of Jews,” said geneticist Shai Carmi, a professor at the Hebrew University of Jerusalem, whose search for study material led him to an archaeological dig at the Jewish cemetery in Erfurt. He and his collaborators were able to analyze DNA of 33 individuals who died between 1270 and 1400, using teeth they found there.
The study follows a similar analysis revealed in August by researchers in England, who studied the DNA from skeletons found at the bottom of a medieval well and concluded that the remains were likely of victims of an antisemitic massacre in 1190. Analysis of six individuals prior to their identification as Jewish revealed that Ashkenazi Jews developed a unique genetic variation centuries earlier than realized.
The Erfurt analysis also includes samples from before the epidemic of Black Death that was until recently understood to have created the genetic “bottleneck” that created the genetic markers common among Ashkenazi Jews today.
Erfurt’s Jewish settlement existed from the 11th to 15th century, with a brief gap following a 1349 massacre perpetrated after the Jews were falsely blamed for causing the bubonic plague. Surviving Jews returned there, but after all Jews were expelled once and for all in 1454, the city built a granary on top of the Jewish cemetery.
Karin Sczech participates in the excavation at the medieval Jewish cemetery of Erfurt. (Courtesy of TLDA Ronny Krause)
In 2013, the city approved the repurposing of the unused granary into a parking lot. Because it was an historic site, a rescue excavation was initiated, overseen for the State of Thuringia by German archaeologist Karin Sczech.
Meanwhile, Carmi had been looking for Jewish cemeteries anywhere in the world “where we could analyze remains already excavated,” he told JTA in a telephone interview from Jerusalem. “I consulted historians and eventually reached the archeologist in Erfurt.” Fortunately, he said, “they still hadn’t reburied the remains.”
He approached Sczech, who later became a co-author of the new study. In 2018, with a supportive judgment from Rabbi Ze’ev Litke — an Israeli expert on genetics and Jewish law — and permission from Erfurt’s then-rabbi, Benjamin Kochan, work began to extract and analyze DNA from detached teeth found in the graves. (About 500 Jews live in Erfurt today, most of them having migrated from the former Soviet Union since 1990.)
American geneticist David Reich picked up the teeth and brought them back to the department of human evolutionary biology at Harvard University in Cambridge, Massachusetts, where drilling and DNA extraction took place.
While the skeletons were reburied, the teeth are still stored at the research institutes where they have been analyzed, in case scientists need to retest to verify the result.
The project provides an ethical basis for studies of ancient Jewish DNA, Carmi said. “Of course we couldn’t just go to a cemetery and dig and take out skeletons; this would be prohibited,” he said, referring to Jewish law prohibiting the removal of bones from where someone was buried.
But Litke opined that the study could be done, because the bones already had been disturbed for an unrelated reason. “He recommended using teeth, as the analysis does almost no damage,” Carmi said.
There are many motivations to study Jewish DNA: One can find lost relatives going back a few generations, and answer questions about Jewish origin of partners intending to marry. But the goal of Carmi’s team was “to fill the gaps in our understanding of Ashkenazi Jewish early history.”
There are several non-destructive ways to obtain DNA from human remains, said Carmi, who also works as a consultant to an Israeli firm that helps clients trace their genetic roots.
“You can take an almost microscopic slice of bone and extract DNA in a solution, or put the entire bone in a solution and extract the DNA without drilling, without disturbing the dead. This opens the way to doing studies even without teeth,” he added.
His team found that the Erfurt community appeared to fit into two genetically distinct groups, descending either from Middle Eastern or European populations. This genetic variability no longer exists, Carmi said.
At the same time, Carmi said, the analysis found remarkable continuity in the local community, as well. “One third of the Erfurt individuals descended from one woman through their maternal lines,” he said, adding that evidence suggested that she lived between 1,000 and 2,000 years ago.
In a press statement, geneticist Reich of Harvard said the work “also provides a template for how a co-analysis of modern and ancient DNA data can shed light on the past. Studies like this hold great promise not only for understanding Jewish history, but also that of any population.”
The research team, with more than 30 scientists, included Hebrew University’s Shamam Waldman, a doctoral student in Carmi’s group, who performed most of the data analysis.
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The Science Behind Streak-Free Windows: What Professionals Do Differently
When it comes to window cleaning, nothing beats the satisfaction of streak-free, crystal-clear glass. But achieving this pristine finish isn’t as simple as grabbing a cloth and some spray. Professional window cleaners have mastered the science behind streak-free windows, using specific techniques and tools to deliver flawless results. Here’s what they do differently and why their methods are so effective.
1. Using the Right Tools for the Job
Professionals don’t rely on standard cleaning products or paper towels to get the job done. Instead, they use high-quality tools specifically designed for window cleaning. Key items in their arsenal include:
- Squeegees: The cornerstone of any professional’s toolkit, squeegees ensure even water removal, leaving no streaks behind. The rubber blades are replaced regularly to maintain their effectiveness.
- Microfiber Cloths: Unlike traditional rags, microfiber cloths are lint-free and highly absorbent, making them perfect for detailing and edge cleaning.
- Specialized Cleaning Solutions: Professionals often use eco-friendly, ammonia-free solutions that dissolve dirt and grease without leaving residues.
- Water-Fed Poles: For high-rise or hard-to-reach windows, water-fed poles equipped with purified water systems are used to clean without streaking.
2. The Importance of Purified Water
One of the secrets to streak-free windows lies in the water itself. Tap water contains minerals, salts, and impurities that can leave behind spots and streaks when it dries. Professionals use purified water systems that remove these contaminants, ensuring a spotless finish.
Purified water also has a natural ability to dissolve dirt and grime more effectively than regular water. When combined with the right tools, it creates the perfect formula for crystal-clear windows.
3. Perfecting the Technique
The way professionals clean windows is just as important as the tools they use. Here are some techniques they employ to achieve streak-free results:
- Pre-Cleaning: Before tackling the glass, professionals remove loose dirt and debris from the surface to prevent scratches.
- Systematic Movements: Using a squeegee, they clean in overlapping strokes, starting at the top and working their way down. This ensures no spots are missed and prevents water from dripping onto already cleaned areas.
- Edge Detailing: Professionals pay special attention to the edges and corners of the glass, where streaks are most likely to form. Microfiber cloths are often used for this step.
- Drying Techniques: Any remaining water is carefully wiped away to prevent streaking. This step is crucial, especially in areas with high humidity.
4. Timing Matters
Professional window cleaners know that timing can make or break the outcome. Cleaning windows on a sunny day might seem like a good idea, but direct sunlight causes cleaning solutions to dry too quickly, leaving streaks behind. Professionals prefer overcast days or cooler parts of the day to ensure optimal results.
5. Safety First
For high-rise buildings or windows in hard-to-reach places, safety is a top priority. Professionals use specialized equipment like harnesses, ladders, and scaffolding to ensure they can clean effectively without compromising safety. This expertise allows them to tackle challenging jobs while maintaining streak-free quality.
6. Experience and Training
What truly sets professionals apart is their experience. Years of practice have honed their skills, allowing them to identify and address potential issues, like hard water stains or stubborn grime, before they become a problem. Their training ensures they can adapt to different types of glass and environments, delivering consistent results every time.
A Trusted Name in Toronto
When it comes to achieving streak-free windows, Toronto Window Cleaners has perfected the art. With over 20 years of experience, their team of fully trained and certified professionals uses advanced techniques and tools to deliver exceptional results. Whether it’s a residential property or a high-rise building, they’ve built a reputation for excellence across the Greater Toronto Area.
In conclusion, the science behind streak-free windows is a blend of using the right tools, employing expert techniques, and understanding the conditions that impact cleaning results. By trusting professionals, you’re not just ensuring sparkling windows—you’re investing in a methodical process that guarantees perfection every time.
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Memoir of child of Holocaust survivors takes riveting twists
Book Review by Julie Kirsh (former Sun Media News Research Director)
Exclusive to The Jewish Post
“We used to Dream of Freedom, A Memoir of Family, the Holocaust, and the Stories We Don’t Tell”
By Sam Chaiton (Dundurn Press) 2024
Sam Chaiton’s memoir of growing up with Holocaust survivor parents in downtown Toronto in the 1950s is a compelling read.
Jeanne Beker, a well known Toronto fashion writer, mentions in her praise for “We used to Dream of Freedom” that her survivor parents talked incessantly about their war experiences.
My own parents, both survivors, would drop tidbits of their stories now and again. I learned to be watchful and vigilant for these rare moments of revelation. However, questioning my parents about the Holocaust, would cause them pain. I knew when to stand down.
In his memoir, Sam Chaiton tells the reader that his parents chose to remain completely silent about their wartime experiences. Poignantly their son was left with a silence that he interpreted as huge empty sound. Although the son could understand some Yiddish, his parents turned to Polish in order to keep the “kinder safe”. Outright denial of illness and death was part of his parents’ way of coping.
Born in the 1950s on Palmerston Boulevard in downtown Toronto, Chaiton paints a vivid picture of his youth as the middle son of five boys. He describes the mayhem of a household of barked orders and punishment by his father’s belt. His mother, as with many other survivors, was obsessed with eating and food. Chaiton learned early that rejecting his controlling mother’s food was one of his few weapons. “It’s hard not to do what a Holocaust survivor wants you to”, he says. Chaiton had to stare down two parents both with tattoos.
Dance proved to be a saving grace for Chaiton. On the dance floor, with a partner, the gates of happiness and permission to be oneself, opened. The Toronto Dance Theatre in Yorkville was a salvation and home for Chaiton. Also important to Chaiton was a family – not his troubled blood family but a chosen one – a commune.
In 1973, after a sojourn in New York, Chaiton decided that he was not a performance dancer. Back in Toronto as he pointedly danced with his mother at his brother’s wedding, she told him that he was her favourite child, imposing “the psychological damage that parental favouritism caused”.
Living in a commune with a chosen family afforded Chaiton the freedom to dig deep into his psyche, face his traumatic upbringing and tear down the rigid rules of society and the biological family. At a certain point, for reasons he explains in the book, Chaiton made the decision to vanish from the lives of his parents and brothers.
In 1980 the commune took up the cause of the injustice and illegal jailing of Rubin “Hurricane” Carter. Carter had been exonerated, released from prison and then reconvicted and sent back to prison.
In hindsight Chaiton wonders if his disengagement from his family caused them the same wounds and feelings of emptiness that Carter had to face when he was reincarcerated.
In 1985 while sitting in a New Jersey prison yard with friends and Carter, Chaiton had the riveting vision that he was in a concentration camp, “on a mission to liberate (his) parents – the dream of every Holocaust survivor’s child.”
In the summer of 1985, Chaiton received the news from Toronto that his parents were involved in a fatal car accident. Only after his mother’s death, was Chaiton able to acknowledge that in spite of her smothering, she gave him a sense of self worth and strength.
In 1988 Chaiton co-wrote the story of freeing Carter. One of his brothers saw him on a news broadcast, contacted him and the 20-year silence between Chaiton and his blood family was over.
Riding on the coattails of the successful release of Carter, Chaiton and some friends established an organization that continues to exist today. Innocence Canada has helped wrongfully convicted people like Guy Paul Morin, David Milgaard and Steven Truscott.
In chapter 16, entitled Wierzbnik, Chaiton finally learns about his father’s testimony published in a book, “Remembering Survival”, by a university professor. Reading about his father’s history helped Chaiton to understand the damage done to survivors, his parents’ trauma and why the home that they created for their sons after the war was so fraught.
Chaiton remarks on the interconnectedness of learning about the sufferings of his parents, his own personal struggles and the gift his father left him of being able to tell his own story.
Sam Chaiton’s profound memoir took courage and brutal honesty to write.
His book teaches that the legacy left by Holocaust survivors, along with a deep sadness, is the innate need of the children to persevere and find their own path of survival and growth.
Obituaries
CAROL SLATER (née GENSER)
With great courage on Wednesday, November 6, 2024, surrounded by her family.
Treasured daughter of the late Esther and the late Percy. Beloved wife of Ron for 69 years. Loving mother and mother-in-law of Charles and Dina Slater, Erin and Joe Battat, Adam and Kit, Claudia and the late David. Cherished grandmother of Zach, Robert and Hydi, Ben and Martha, Liam and Addison, Thom and Emeline, Max, Ilai, Emanuelle and Eli. Proud great-grandmother of Rafael, Lily, Maya, and Jojo. Special sister and sister-in-law of David and Joan Genser, Roberta and Mayer Lawee; and sister-in-law of Joel and Sheila Slater. Greatly missed by her nieces, nephews, family, friends and by all who knew her.
The family would like to thank Drs. Shamy, Lipes, Chang, the doctors, nurses and staff at the Jewish General Hospital Palliative Care Unit as well as DeyDey, Linette and everyone who took such wonderful care of our Mom.
Funeral service from Paperman & Sons, 3888 Jean Talon St. W., on Sunday, November 10 at 9:30 a.m. Livestream available. Burial in Israel.
Donations in her memory may be made to the “Carol and Ron Scholarship” c/o Mothers Matter Canada 1-604-676-8250
Publish Date: Nov 9, 2024
CAROL SLATER
(née GENSER)
With great courage on Wednesday, November 6, 2024, surrounded by her family.
Treasured daughter of the late Esther and the late Percy. Beloved wife of Ron for 69 years. Loving mother and mother-in-law of Charles and Dina Slater, Erin and Joe Battat, Adam and Kitt, Claudia and the late David. Cherished grandmother of Zach, Robert and Hydi, Ben and Martha, Liam and Addison. Proud great-grandmother of Rafael, Lily, Maya, and Jojo. Special sister and sister-in-law of David and Joan Genser, Roberta and Mayer Lawee; and sister-in-law of Joel and Sheila Slater. Greatly missed by her nieces, nephews, family, friends and by all who knew her.
The family would like to thank Drs. Shamy, Lipes, Chang, the doctors, nurses and staff at the Jewish General Hospital Palliative Care Unit as well as DeyDey, Linette and everyone who took such wonderful care of our Mom.
Funeral service from Paperman & Sons, 3888 Jean Talon St. W., on Sunday, November 10 at 9:30 a.m. Live stream available. Burial in Israel.
Donations in her memory may be made to the “Carol and Ron Scholarship” c/o Mothers Matter Canada 1-604-676-8250
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