Post-it note with handwritten message in red marker. The message reads: "We will love you forever." Creasing due to exposure to the elements at the Wilkins memorial.

Printed sign with red, blue, green, and purple ink. The sign reads: "Lifting up our prayers for the Tree of Life synagogue, victims, families, and first responders."

Blank white posterboard.

Oral history of Nina Butler, recorded as part of the Meanings of October 27th Oral History Project.

Laminated mixed media collage with paper, dried leaves, and marker. Tree in the center; two clouds and sun in upper register. Handwritten inscriptions in various marker colors on tree trunk and center left. Bleeding to back and signs of water exposure; creasing.

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

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside contains messages of condolence, love, and wishes for strength. The church's contact information is included on the back of the envelope.

Triangle-shaped card from a student at Fountain Valley School in Colorado Springs, Co. The card reads: "Dear members of Tree of Life, I am a Chinese [student] who is now studying in U.S. I am sorry about the situation that happened recently. Personally, I support you, do not be afraid! Peace be with you." Star of David in the upper center, peace sign in the bottom center.

Note from a member of The Church at Severn Run in Severn, Maryland. The note is enclosed in an envelope with church letterhead, reading: "The Church at Severn Run: Love Well, Live Jesus, Believe Big!" The note inside contains a prayer for God's grace and love. The church's contact information is included on the back of the envelope.

Handwritten note written in blue ink on a lined notecard reading: "Sending all of my sympathy, empathy and love. I don't know what else to say. -Hope [last name redacted]. Brooklyn, New York (Former Pittsburgher)."

Post-it note with handwritten message in black marker. The message reads: "We are stronger together!!" Signed: "Arielle."

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!"

Envelope and floral tag addressed to Jerry Rabinowitz. The envelope is addressed "Jerry" and features an illustration of a bow and heart. The floral tag contains an illustration of an owl with mushrooms and other fauna growing from its head. The sender, Michele, knew Jerry from Coffee Tree Roasters. Michele recalls how Jerry's sweet smile and bright bow ties made a positive impact on her life. Michele illustrated a second bow tie in the upper right corner of the tag.

Folded card on brown paper. Two circular stamped imprints visible in the center of both the right and left flaps. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.

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."

Post-it note with handwritten message in blue marker. The message reads: "We are strong [underlined] and we will not forget your memory."

Handout on grief, trauma, and critical incident stress debriefing, which was sent with the materials from Emergency Ministry Services, a faith-based training and disaster response NGO in San Juan Capistrano, Ca., affiliated with the Orange County Church on the Rock.

Handwritten letter written in black ink on lined notebook paper from Michelle. Michelle is a lifelong Pittsburgher whose mother worked in Squirrel Hill when Sophie Masloff, Pittsburgh's first Jewish and female mayor, was in office. Michelle recalls her mother's pride in serving Masloff. Michelle notes that she is a student at the University of Pittsburgh and currently lives in Squirrel Hill. She apologizes for being "neglectful" of her ties with the Jewish community. She wrote this letter to extend "my very friendly hello" and to communicate her solidarity.

Post-it note with handwritten message in blue marker. The message reads: "May your loved ones rest in peace. May your hearts heal and know that we are with you and will defend and love you."