Post-it note with handwritten message in black marker. The note is written in Hebrew and English. Translated into English, the message reads: "The People of Israel Lives. Love from Toronto, Mark [last name redacted]."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4, 2018 and reads: "To the beautiful Tree of Life community in Pittsburgh from a Presbyterian in San Diego: Shalom... May your deepest sorrows be comforted by God's soothing peace. May you feel the support of others around the world. Imagine me, a teacher named Carolyn V., carrying 2 buckets to hold your tears and mine as I grieve with you. Never let evil win. LOVE WILL TRIUMPH. Love from C. [last name redacted] [heart symbol]."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "Tree of Life Community- All of your brothers and sisters at Point Loma Community Presbyterian Church mourn with you. We are absolutely devastated at the events of last week's service, and there are no words one can say to make sense of it. The God of Abraham, Isaac, David, and Jacob is with you, and we pray for comfort, community, city, our country and our world.

Card from the Friendship Circle of Illinois. Front cover reads: "From: Menachem [last name redacted] To: Jewish Community of Pittsburgh." Inside reads: "To the Jewish community of Pittsburgh sheyichyu (may they live). Passed away: 11, Injured: 2 Yidden (Jews) + 2 policemen=4. Illustrated below there is a wagon holding the shooter, who says in a word bubble: "I just wanted to kill Jews." A man with a hat, perhaps a police officer, is seated on the right.

White poster with handwritten message in black ink reading: "Pittsburgh loves all our neighbors." The hashtag, "Pgh Strong" is written vertically in the lower left corner. Extensive color bleeding due to exposure to the elements at the Wilkins memorial.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Our hearts ache and break for and with you. We are with you in this and will remain prayerful as you walk through this incredible loss. With much love, Mary Jo [last name redacted]."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "I am here in this moment" surrounded by arrows and other geometric symbols. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Prayer card with reproduction of "The Miraculous Icon" depicting the Virgin and Child. According to the text on the front cover, this prayer card was blessed at mass with holy water and incense. The inside features various recommended prayers for healing and petitions.

Printed tag with a photograph of David Rosenthal. The tag reads: "In Memory of David Rosenthal." Creasing and staining due to exposure to the elements at the Wilkins memorial.

Envelope and floral tag with ribbon addressed to Marty and Robert. The tag features an illustration of an owl with mushrooms and other fauna growing out of its head. The inside contains a note to Marty and Robert, whom the sender is thankful did not attend synagogue on the morning of October 27.

Folded card on red paper with handwritten messages in black marker. The front cover is addressed: "To the strong and resilient Jews of Squarrel [Squirrel] Hill," with a heart. The inside contains a message of support and solidarity from an anonymous Jew.

Folded card with marker illustration. Front and back cover features illustrations of heart superimposed on tree. Interior features illustration of two figures beneath word bubble "Freedom!" and nine balloons.

Glass vase containing a variety of stone, colored glass, and synthetic red poppy flowers. Included in vase are tags reading, "Dept of NJ American Legion Auxiliary" and "In memoriam."

Post-it note with handwritten message in red marker. The note, which is written inside a heart, reads: "We love you guys." Two Stars of David appear on the lower right and center.

Folded card with colored pencil illustration. Front and back of card feature Stars of David enclosed by hearts. Inside reads: "Thumbs up I feel your pain" and features a stylized thumbs up and a smiley face.

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.

Pages of typed text.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a flower. 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.

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.