Post-it note with handwritten message in green marker. The message reads: "Pittsburgh, I will always love you. My heart goes out to you and is here too. Pittsburgh Strong."

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

Post-it note with handwritten message in green marker. The message reads: "Sincere condolences to all the families. Let there BE PEACE [underlined] on EARTH and Let it Begin with ME. Philomena."

Letter written with red ink on lined notebook paper. The letter reads: "Stay strong. Gone but neve[r] forgotten. From Graccie [last name redacted]. We miss you." Illustrated with a small heart and Star of David.

Post-it note with handwritten message in black marker. The message reads: "What happened here will not be forgotten." Signed with a Star of David.

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: "Peace" and features a sandy landscape with a blue sky and orange flowers. The inside reads: "I pray you will find love and peace in the everyday actions of people who care for you. We send so much love to you from Londonderry, New Hampshire and beyond. Love and peace, Erin [last name redacted]."

Diamante poem by Reena [last name redacted], 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. A diamante poem is a seven-line unrhymed poem which is shaped like a diamond.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Tree of Life, We are a Junior High small group from PLCPC. We are sorry for your loss. We are praying for the injured and those friends and family of those who died. We will continue to pray as your community continues to heal. Point Loma Community Presbyterian Church San Diego, CA. Mindy, Allison, Ellis, Mike, Logan, Georgia, Ana, Tessa, Sarah, Quinlan."

Floral tag from floral arrangement, which reads: "We are sorry for your loss and hope you feel better." Note is handwritten in black ink on a printed tag featuring a white rose on the left.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "We are thinking of you and hope you may find peace during this tough. You and your families are in our thoughts. I know God is thinking of you and will keep you protected in his hands while you go through this. It is not fair and we won't understand why this happens. It is terrible and God doesn't give us more than we can handle but it sure feels that way sometime. Just keep peace in your heart and forgiveness for this senseless act.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Our hearts are with you. The Bolsters, Point Loma."

Handwritten card in colored pencil on paper. A blue and green colored globe, surrounded by alternating male and female stick figures in purple, red, and yellow, appears in the center. The globe is inscribed: "We are thinking of YOU!!" The upper and lower edge of the card reads, in Hebrew: "Am Yisrael Chai"(the People of Israel live). Four Stars of David appear on either side of the globe. Signed: "Hannah S. 8th grade at Yeshivat Noam."

Post-it note with handwritten message in blue ink. The message reads: "We love you and support you." Color bleeding due to exposure to the elements at the Wilkins memorial.

Post-it note with handwritten message in black marker. The message reads: "There is always hope in the face of despair [despair] and kindness will guide us through." Tape affixed to the upper edge.

Card from the Friendship Circle of Illinois. The front cover reads: "To: The Jewish Community of Pittsburgh. From: Yisroel [last name redacted], Chicago IL." The inside reads: "I feel so sad for you. My hachlata (resolution) is to give 3 cents instead of 1 or 2 cents. You should have everything you need. And Hashem (God) should give you all that you need." Spelling errors have been corrected for clarity.

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 encouragement and the sender's prayers for God's blessing. The church's contact information is included on the back of the envelope.

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 prayers for peace and unity. The church's contact information is included on the back of the envelope.