Large square card from a student at Fountain Valley School in Colorado Springs, Co. Card reads: "Dear members of Tree of Life[s], I am an international student from China. I heard the sad news about the sad thing [that] happened in the Synagogue. I felt really sorry about that and I know I can't do anything to let you feel better. But I am always on your side. Support the sad family. So please strong to stay together. Peace be with you. - Isabel L." Illustrated Star of David and peace sign on lower left.

Typescript document stapled in upper left-hand corner, 10 pages.

White posterboard with handwritten messages and hand drawn illustrations in black marker. A large tree with the words, "We are all of Tree Life," appears in the upper center. Various messages by over two-dozen people appear throughout.

Laminated prayer card with text of the "Prayer to Our Mother of Perpetual Help" on the reverse. The front side features a reproduction of a medieval-style icon of the Virgin and child against a gold backdrop. This prayer card has the imprimatur of the former archbishop of Boston, William Cardinal O'Connell (1859-1944).

Floral tag from floral arrangement sent by a couple from Virginia. Handwritten message in blue ink on a printed tag featuring a white orchid on the lower right.

Post-it note with handwritten message written in black marker. The message reads: "We are always with you. You are not alone. Be strong." A smiley face and heart appear below.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird feather 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."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dearest sisters and brothers in the Lord, I just wanted to encourage you in the midst of all this tragedy and sadness that God will rise up among the carnage and be glorified through such honor and sadness. He is alive and well, and I know it doesn't feel like He is among you. He is and He will reign forever and be there with you in these hard times. He loves each and every one of you and has a plan for all of this.

Post-it note with handwritten message in green marker. The message reads, in Hebrew, "Shalom" (Peace). Illustrated with a green heart, flanked by stars, in the lower center.

Eight-page booklet printed on off-white paper. Program provides order of memorial service, lists names of deceased congregants by family, and lists names of congregational officers.

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: "Faith is the friend that comes along when things just seem to go all wrong." The inside reads: "To the Tree of Life, My thoughts and prayers are with yours. Nancy [last name redacted]."

Post-it note with handwritten message in black marker. The message reads: "We should all remember preaching hate results in hatred. Preach love, and support!"

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The front cover of this card features a heart with the words "God is love." The inside reads: "May you find God's comfort in knowing we are with you in spirit- May the spirit of God stir in the souls of all on our earth to stop the violence against God's people. We want peace on earth and it starts with us knowing our God of peace and love. God bless you and your whole community of believers. Pt Loma Community Pres. Church Loves you all."

Handmade, screen-printed card on yellow paper with green paint. A heart appears in the center. Signed, lower right: "Love, Khira D." The card has been laminated.

Handmade card illustrated with assorted hearts of varying sizes. A large red heart appears in the middle, surrounded by smaller hearts in varying colors. Color bleeding and fading due to exposure to the elements at the Wilkins memorial.

Video of "An Act of Valor" event held at the Heinz History Center, featuring October 27 attack survivors Dan Leger and Tim Matson and Rauh Jewish Archives Director Eric Lidji.

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

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "We are shocked that this individual felt he could do such a thing. Who gave him the power to act as God? All our prayers are with your community and faith. Blessings! A sad Presbyterian member!"

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.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "My prayer and heart are with you all. May God's Grace lift yours in this time of sorrow-." Signed with a heart symbol.