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."

Handmade sign with white graph paper and black marker taped to cardboard, reading: "From Ohio and Oklahoma, you are loved and will not be forgotten."

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 reads: "God is love, and love never fails." The church's contact information is included on the back of the envelope.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "G-d be with you. Know that the great-grandson of Or' [?]- gollath will always fail through those who the follow one true G-d." David.

Post-it note with handwritten message in blue marker. The message reads: "Thank you for being strong."

Clear glass vase containing a variety of blue, purple, and white synthetic flowers. Flowers nestled in wired silver tinsel. Bottom half rusting and discolored from moisture exposure.

Post-it note with handwritten message in blue marker. The message reads: "May your memory be for a blessing. Sending love and healing from Jews in Berkeley, CA." Signed with a Star of David.

Printed tag dedicated to Irving Younger. The tag reads: "Please accept this Random Act of Kindness In honor of Irving Younger. Taken too soon, October 27th, 2018. 1 of our 11 Angels from the Pittsburgh Tree of Life synagogue shooting" followed by a series of hashtags and contact information on Facebook. Tape on the reverse.

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "Dear Blessed Children of God, I am praying for you in these extremely difficult days. Know that you are being held in prayer. You are loved. Praying for Peace, Comfort, and a Hedge of Protection around you and your community. With love, A follower of Christ."

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."

Black and white photograph showing two young women standing before the iron gates of a synagogue. Label taped onto photograph reads, "Bess & Rose Velgich in front of Oir Chodosh 1945." Original photograph has pinked edges and dried tape.

Handmade card on white paper. Eleven trees, illustrated in blue ink, appear in the center. The number 11 appears below, followed by a heart. The card reads: "For the 11 people that died. Love, Coleman [last redacted]."

White posterboard with handwritten messages of support from the Thornhill Rebels in Toronto.

Folded card with marker illustration. Cover features illustration of Star of David inside heart under name "Aden." Interior features illustration of five balloons and words, "We want you to know that you are not alone. Sending warm thoughts and hugs to your community. Beth Chai."

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 reads: The church's contact information is included on the back of the envelope.

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.

Cut out card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird with a leaf in its mouth and floral and geometric motifs. The back contains a handwritten note.