Post-it note with handwritten message in blue ink. The message reads: "We love [heart] Tree of Life." Staining and color bleeding due to exposure to the elements at the Wilkins memorial.

Floral tag from floral arrangement addressed to the members of the Tree of Life synagogue. The note is printed on a tag with a beige background from a local florist; tearing in the center right due to exposure to the elements at the Wilkins memorial.

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.

Folded card with marker illustration. Cover shows a Star of David in the center, surrounded by six hearts. Inside features a tree and reads: "May you all be surrounded by love at this difficult time." Back features a Star of David encircled by a heart.

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.

Card from the Friendship Circle of Illinois. The card reads: "To the Jewish community of Pittsburgh sheyichyu (may they live): I am very sorry that 11 of 10 people (Jewish) got shot. It's mamash (really) a very big tragedy. I will try to do everything I can to bring moshiach (the Messiah) and t'echias hamaisim (resurrection of the dead). And the cops tried shoot him and catch him but, there was no use. The robber already shot 11 people. Thank g-d they shot him.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "I'm praying for everyone that lost a love one. I will pray for everyone that died. Sincerely, Hannah [last name redacted]." Spelling errors corrected for clarity. Color bleeding due to water exposure at the memorial site.

Glass vase containing a bouquet of yellow and orange synthetic flowers.

Oral history of Wally Caplan, recorded as part of the Meanings of October 27th Oral History Project.

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.

Oral history with Ira Frank recorded as part of the Meanings of October 27th oral history project.

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.

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."

Printed poster in blue, white, and black from the ACLU (American Civil Liberties Union). The poster reads: "We the People" and features an illustration of people in silhouette raising their hands upward. The reverse reads: "We the People ACLU" and contains a repeating word pattern featuring the various marginalized groups the ACLU serves.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. Due to water exposure at the memorial site, the message in this card has been partially erased. The remaining text reads: "[?] everybody is ok...praying for those...are hurt and kill. [Na]me: Elio age: 10... [Holy Ang]els" CCD."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "To Members of Tree of Life Synagogue, We are family and feel your grief. Prayers for our world to know and respect our roots together. Love and hope to you as you recover and move on with joy. Sincerely, Christi [last name redacted]."

Card addressed to David Rosenthal, written using personal details from various public sources.