Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Be Strong" and other floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover features the following quote: "Let your smile change the world but don't let the world change your smile." The inside reads: "Dear Tree of Life Congregation, I am very sorry for the bad news. I am a social studies student in Goddard Middle School. I know the feeling of losing someone, and it must be a very hard time for you guys. just so you know we'll be there for you guys and you'll always be in our thoughts. Sincerely, Evangeline."

Metallic red rose with wire stem attached to a rock base.

Post-it note with handwritten message in blue ink. The message reads: "We are here."

Video of "An Act of Valor" event held at the Heinz History Center, featuring October 27 attack survivors Dan Leger and Tim Matson and Rauh Jewish Archives Director Eric Lidji.

Floral tag from floral arrangement sent by Sophia and another individual whose name is illegible. The tag is dated 10-29-2018 and reads: "You are in our prayers and thoughts. I'll walk with you in your support." The message is written in black ink on a printed tag with multicolored flowers in the lower right corner. The reverse is stamped with the contact information for Squirrel Hill Flower Shop.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a turtle with floral motifs on its shell, feet, and neck. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Square card with white and yellow text against blue background. Card reads, "Mitzvah4Pittsburgh. Some spread darkness. We spread light. Choose a good deed. Choose a Mitzvah. Add light to the world," followed by four options and a place for respondents to list their name and email address. Some names and email addresses have been redacted for privacy.

Summary: Pittsburgh Post-Gazette Editorial Board editorial calling for community in the aftermath of the October 27 attack. Compares attack to other recent local tragedies, including the shooting of three Pittsburgh Police officers in Stanton Heights in 2009 and the Flight 93 crash in Somerset County on Sept. 11, 2001.

Floral tag from floral arrangement sent by a group of six families. The tag commemorates the ten trees that were planted by the National Forest Foundation in memory of the October 27 attack victims. The note is printed on a tag with a beige background from a local florist.

Summary: Pittsburgh Tribune-Review profile of the Squirrel Hill neighborhood and its response to the October 27 attack. Includes interviews with local residents and businesses-owners.

Double-sided letter. The front features a letter written in blue ink on a white background. The letter is addressed to the families and friends of the October 27 attack victims, the three congregations that gathered to pray at the Tree of Life synagogue, the people of Squirrel Hill, the people of Pittsburgh, as well as all citizens of the world. The addressees are listed in six respective hearts in the upper center. The hearts are surrounded by the branches of two trees which frame either side of the letter.

Summary: Pittsburgh Post-Gazette breaking news report on the October 27 attack, updated throughout the day as events unfolded. Lists charges filed against alleged perpetrator. Includes map of the Tree of Life building, pinpointing locations of key moments of the attack. Also includes accounts from people who witnessed aspects of the attack.

Handwritten letter written in black ink on lined notebook paper from a Jewish resident of Riverdale, Ny. Addressed to Congregation Tree of Life, the Squirrel Hill community, Pittsburgh, and everyone grieving from the October 27 attack.

Post-it note with handwritten message in black marker. The message reads: "Rest in Peace. Toronto."

Post-it note with handwritten message in red marker. The message reads: "99.9999999% of Americans are good and caring people!" Tape on the upper edge.

Post-it note with handwritten message in blue ink. The message reads: "We love you. You are all so strong." Signed with a heart. Color bleeding due to exposure to the elements at the Wilkins memorial.

Post-it note with handwritten message in blue marker. The message reads: "Blessings of love from Israel."

Post-it note with handwritten message in pink marker. The message reads: "Our hearts cry with yours for shalom." Signed with a heart, cross, and Star of David.