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

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

Post-it note with handwritten message in red marker. The message reads: "All of New York City feels your pain."

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Handwritten note written in purple marker on white paper reading: "Our prayers and sadness are with you on this tragic day." Signed by the Yu, Kaufmann, and Bernstein families. Color bleeding due to exposure to the elements at the Wilkins memorial.

Sympathy card including handwritten note reading, "Hate Can't Destroy a City of Steel/May the Love and Stories of those lost live on forever/You are all loved by your neighbors."

Floral tag from floral arrangement, which reads: "There is no good way to express the grief and horror our community feels. We will continue to mourn with you." 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.

Sepia-tone photograph showing large group of people in a banquet hall decorated with streamers, Stars of David, and American flags. Text at bottom reads "The 25th Anniversary banquet of the Congregation 'Oher Chodosh Anshe Romanian' February 26, 1928 Pittsburgh Pa." Original photograph is creased in several places and missing one corner. 

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.

Post-it note with abstract illustration in blue and green marker.

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.

Note addressed to Jerry Rabinowitz written on the back of a business card from Doug [last name redacted], a certified Pilates instructor in the Pittsburgh area. The note reads: "Dear Jerry- I will miss you. Best peace sir!"

Collage with a hand drawn tree in the center. Leaves comprised of multicolored tissue paper; one ready-made decorative leaf in orange and yellow fabric. Handwritten messages and illustrations in multiple colors on either side of the tree; signed lower center.

Card with ballpoint pen illustration. One side reads "We Are With You" with zigzag decorations in corners. Reverse reads, "Don't worry. You are not by yourself. We will support you!" with illustration of hand reaching out.

Bright pink paperboard with messages written in black on the front. Blank back.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "We are shocked that this individual felt he could do such a thing. Who gave him the power to act as God? All our prayers are with your community and faith. Blessings! A sad Presbyterian member!"

Poster with short messages and multiple signatures from students at the St. Joseph Catholic Parish Religious formation written in various colored markers.

Post-it note with handwritten message in black ink. The message reads: "You are so strong. Thank you for being so strong in the face of evil. Please be more Jewish. We must show our community's great life in the wake of antisemitism. That is the best revenge. Growth. Love. Life."