Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope features an illustrated heart. The front cover reads: "LOVE." The inside reads: "Remembering all of you and sending prayers and healing thoughts from St. Peter's Parish in Londonderry NH. Love, Sandi [heart]."

Laminated posterboard with a tree with heart shaped leaves in the center. Each heart contains a message or signature from sender. Blank back. Signed: "With love, the children of St. Patrick's School in Canonsburg."

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.

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 upper center. Minor bleeding to back and signs of water exposure; creasing.

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.

Handmade card on white paper. Three flowers, illustrated in purple ink, appear in the center. The card reads: "I am sorry what happened... [illegible] from Griffin."

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 affirms God's support and contains prayers for the families and community. The church's contact information is included on the back of the envelope.

Card with colorful illustration of an architectural, urban landscape. Message inside affirms the senders' love, solidarity, and hope, and wishes of kindness.

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "Dear Blessed Children of God, My heart is broken over the recent news of tragedy and the horror and fear that it caused. I pray for peace. I pray for courage and strength to continue to serve our God of love. I pray for healing and again, God's peace. With love, Jackie [last name redacted]."

Floral tag from floral arrangement sent by Bham. Handwritten note in black ink on printed tag with various flowers in the upper and lower left corners. The reverse is stamped with the contact information for Squirrel Hill Flower Shop.

Page of typed text on light blue paper with creas marks. Explains the background and mission of Squirrel Hill Stands Against Gun Violence and provides contact information.

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 messages of condolence and prayer. The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in blue marker. The message reads: "You are loved. You are stronger than hate. Love and more love."

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Hand painted card with abstract lines and shapes in brown, green, and blue paint on paper. Signed: "Love, Khira D." lower right. The card has been laminated.

Printed note in light blue ink on white paper. The note reads: "Love and Peace" and is illustrated with peace symbol.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Hello, Dear Friends- I am a visitor at this church today- as the wife of a Catholic with a Jewish son-in-law and a nephew who lives on Squirrel Hill Ave- I just had to send some Presbyterian prayers as you grieve and recover. We are all the Family of God! Love and blessings- Mary Ellen [last name redacted]."

Post-it note with handwritten message in blue ink. The message reads: "Prayers for Pittsburg[h]. May this never happen again anywhere." Color bleeding due to exposure to the elements.