Hand painted card with a rainbow-colored heart on the front. Signed lower right: "Love, Brian S." The card has been laminated.

Post-it note with handwritten message in blue marker. The message reads: "Love is awesome." Tape affixed to the upper edge.

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!"

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 card reads: "Tree of Life Synagogue" and contains the following note: "TREE OF LIFE, I am very sorry for your loss. I send prayers that it gets better. I pray for your loved ones. Holy Angels, 6th grade, Brooklynn."

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.

Handwritten note and envelope from new residents of Squirrel Hill, formerly of Santa Barbara, Ca.

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 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."

Handwritten note written on paper with the letterhead of the North Side Public Safety Council. The note reads: "Sharing our sincerest sympathies" and is signed by the officers of this council. A map of the various neighborhoods in the North Side and a blue line design below.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of seven children holding hands around a table with a large goblet and loaf of braided bread, and seven doves. The illustration is labeled: "We are people of God's peace." The inside reads: "Don't bully people and stand up for people when they are getting bullied."

Card made by a student from the George Washington University Hillel. The front cover reads: "Hugs" with asterisks on either side. The inside (from right to left) reads: "Sending you messages of hope, love, and comfort from Washington D.C. Love, Alex. May God be with you and your families."

Handwritten note in black marker which reads: "Love is that which enables choice. Love is always stronger than fear. Always choose on the basis of LOVE." Tearing in left upper corner due to exposure to the elements at the Wilkins memorial.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover features the following quote: "No act of kindness no matter how small is ever wasted." An illustration of a rainbow appears below. The inside reads: "Dear Tree of Life Congregation, I am sorry for your loss. I am writing to you from Colorado. I would like you to know people far away care for you. I may not believe in Judaism but I believe your heart is in the right place. Sincerely, Uyen [last name redacted], Littleton, Colorado."

Folded card in the shape of a Star of David from a student at Fountain Valley School in Colorado Springs, Co. Card reads: "Dear members of Tree of Life Synagogue, I am an international student from Japan. I heard sad news at October 27th. I feel so sorry for that. Stay strong, I stand with you. Shalom." Illustrated with a Star of David and Japanese flag lower center.

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "In light of recent events, I want to send over my condolences and love. I want you to know that this is not who we Christians are. We are not hate- only love. Your community is always and forever in prayers. [Smiley face]."

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: "Dear Tree of Life members, I am keeping you and all of the others affected by this tragedy. My deepest sympathy, Molly [last name redacted] Holy Angels CCD."

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "Dear friend, I am so joyful that you exist! As the well-loved child of God, you have an infinite worth and deserve so much love. My prayer is that you begin or continue to understand this throughout your life. May your life continue to be blessed. I love you! Love, Your friend from the Church at Severn Run."

Yellow card with extensive red staining. Due to exposure to the elements at the Wilkins memorial, the message on this card is no longer visible.