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image of the CSHL Hazen Tower with lightning bolts in the background sky
Lightning streaks across the sky above CSHL’s Hazen Tower, not unlike the electric pulses that pass between neurons in the brain.

HarborScope blog

Hazen Tower

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Every hour on the hour, from 8 a.m. to 8 p.m., a bell tolls at Cold Spring Harbor Laboratory (CSHL). Whether you’re enjoying a walking tour, attending a Symposium, admiring some campus art, or just going about your day at the lab, Hazen Tower is hard to ignore. Orienting visitors and staff in time and space, the 65-foot-tall bell tower, or campanile, is one of CSHL’s most unique features.

Hazen Tower is the centerpiece of the courtyard linking CSHL’s Beckman Neuroscience Building and Dolan Hall. At its peak hangs a bronze bell weighing nearly a ton. Above the bell, four letters are inscribed in gold: “a” for adenine, “c” for cytosine, “t” for tyrosine, and “g” for guanine. They’re the building blocks of DNA, the basis of life as we know it. An appropriately shaped helical staircase rises from the ground between the tower’s four brick columns. It winds its way up to a circular platform offering an unobstructed view of the inner harbor.


You don’t have to visit CSHL to hear Hazen ring. Listen to any episode of At the Lab, and you’ll catch the bell in our three-minute podcast’s opening theme.

“One of the things I love about working at CSHL is the environment,” CSHL Assistant Professor Lucas Cheadle says. “Hazen Tower is one of the first landmarks you see from across the harbor. Its spiral staircase is a clear homage to the genetic code that lies within each individual on campus. Performing basic biology research in an environment that is so intertwined with nature creates a synergy that helps propel our work forward.”

Hazen Tower was named in honor of former CSHL Trustee Lita Annenberg Hazen. The late philanthropist was a lifelong supporter of science. In the late ’80s, she became a founding donor of CSHL’s then-budding Neuroscience Program. Her support was key to the construction of the Beckman Neuroscience Laboratory, dedicated in 1991 alongside Dolan Hall and Hazen Tower.

Image of the CSHL Hazen tower with members of the Cheadle Lab standing it the buildings stairwell
“For my lab members, the Tower is a motivating structure to encounter each day,” says CSHL Assistant Professor Lucas Cheadle, pictured here with his team (second row, center). “It reflects the work we are doing to understand how genetics and the environment intertwine to promote brain development, and how mutations can lead to neurodevelopmental disorders such as autism.”

Today, Beckman houses the labs of five CSHL researchers. Professor & HHMI Investigator Leemor Joshua-Tor studies the molecular machinery our cells depend on to function normally. Professor Hiro Furukawa explores how the brain regulates signals passed between neurons. Associate Professor Jessica Tollkuhn studies sex hormones’ roles in the brain. Assistant Professor Gabrielle Pouchelon focuses on the origins of neurodevelopmental disorders. And Assistant Professor Lucas Cheadle investigates how immune cells called microglia interact with the brain. (In fact, you can catch him talking about this topic as part of our Cocktails & Chromosomes series at Industry bar in Huntington, NY.)

As for Lita Annenberg Hazen, the biomedical philanthropist passed away in 1995. However, her contributions have helped ensure the Laboratory’s place at the forefront of neuroscience research. Today, her legacy remains every bit as strong as the tower that bears her name.

Image of the Hazen Tower and the Neuroscience Courtyard at CSHL
CSHL’s Neuroscience Courtyard. Image: Timothy Hursley, Derek Hayn/Centerbrook

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