Six months ago, a thoughtless tragedy threatened the city’s resilience. The Boston Marathon is not just an event, but rather a universal symbol of strength. Roughly 27,000 runners from around the world commit to pushing themselves for 26.2 miles, while 500,000 spectators stand by to cheer them on. The tradition is woven into the fabric of our community.

On April 15, 2013, bombings at the marathon finish line aimed to destroy that fabric, and a team at Northeastern University is now inviting individuals to strengthen it.

Our Marathon, a comprehensive, crowd-sourced digital archive of the Boston Marathon bombings, is hosting an exhibit Tuesday to commemorate the event’s six-month anniversary. The exhibit, which is free and open to the public, will feature photos, videos and stories from the archive, as well as a display of items originally placed at the Copley Square Memorial, on loan from the Boston City Archives. From 1 to 8 p.m. in Northeastern’s Snell Library, attendees will have the opportunity to submit their written and oral reflections to the archive on-site.

“We’re six months out, and there’s a lot that still needs to be captured,” says Ryan Cordell, an assistant professor at Northeastern who’s spearheading Our Marathon alongside Professor Elizabeth Maddock Dillon. “There’s still a lot more work that needs to be done for the community. We don’t want to let these stories fade away before they can be captured and saved for posterity.”