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.

Rectangular piece of plywood wrapped in metal with embossed design of Hebrew word "Chai," meaning "Life."

Business card from Art of Steel, Ltd., a gift store located in Pittsburgh's Strip District neighborhood.

Typed note from the members and friends of First Presbyterian Church in Jamestown, Ny. The text of Psalm 23 appears below. Extensive staining due to exposure to the elements at the Wilkins memorial.

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

"I voted" sticker with the "Stronger Than Hate" emblem on an orange background. The sticker includes the logo of the local printing company, Raff Printing, Inc. on the lower right. Dirt and other materials on the adhesive back due to exposure to the elements at the Wilkins memorial.

Handwritten tag in silver ink on heavy cardstock lined on an orange backing. A small snail, labeled: "Certified and Official Snail Mail" is embossed on the upper center. The note reads: "With Love, Mark [last name redacted] Beaver Dam, WI." Dirt stains due to exposure to elements at the Wilkins memorial.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a heart with floral and geometric motifs. A handwritten note and signature appear in the lower left and right corners respectively. The back features 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 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."

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. Signed "Nikoletta" on the right. The back contains a handwritten note, "Stronger Together" sticker, 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 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."

Card addressed to Melvin Wax, written using personal details from various public sources.

Single page flyer. Backdrop features color photograph of lit tealight candles. Text lists title, date, time, and location of event, biography of speaker, and a list of sponsoring organizations. Footer includes logo for the Yeshiva University Center for the Jewish Future Speakers Bureau.

Page of blank stationery. Navy blue printing on white paper. Header read, "Congregation Oher Chodosh 79-81 Roberts Street, Pittsburgh, Pa. 195_."

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: "Don't Stop Believing." The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

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 am so sorry for what happened to the people whom you love and know." An illustrated crying, sad face appears below.

Post-it note with handwritten message in black marker. The message reads, in Hebrew and English: "Rest in Peace." Signed by Rabbi Fred Pomerantz.

Card from the Friendship Circle of Illinois. On the left side, the card reads: "To the Jewish community of Pittsburgh sheyichyu (may they live), I will take upon myself to stay in shul (synagogue) at least for 3 aliyas (sections Torah reading where a congregant is called up to the reading podium). On the right side, the card contains cartoonish illustrations of a building and several figures. The acronym "B"SD" (with the help of heaven) appears on the upper right.