Blank Goddard Middle School postcard. Front reads: "Goddard Middle School Good News!" and features the school's symbol.

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."

Post-it note with handwritten message in black marker. The message reads: "May god be with you. Cierra [last name redacted]. Pittsburgh, PA."

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: "We must stick together in times like these because together we are STRONG and no one can take that away from us. Enzo."

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, I'm sorry for your loss. Hope everything goes well. From Bella [last name redacted]."

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."

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.

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.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/2018 and reads: "June [last name redacted] My sincere heartfelt condolences to my Jewish family. This is a really heartfelt and sad time for me as Jews from Philadelphia sponsored me into this beautiful country allowing me to become a permanent resident. I lived with them for 18 months and raised their daughters as her nanny house keeper.

Paper booklet with typed text and graphics throughout. Includes itinerary, names of 11 victims, text of "We Remember," acknowledgements, and additional information. Include two quotations by Mahatma Gandhi.

Handwritten card in pencil on paper. The front cover features a Star of David in the center and reads in Hebrew: "L'chaim" (to life). The inside reads: "My condolences for this tragedy. Sending love from Cleveland, Ohio. Stay strong. You are in my prayers. Love, Louis [last name redacted]."

Handwritten and illustrated card in colored pencil on scratch paper. The card features an illustrated tree and Menorah and includes various messages, including, "Happy Chanukah" and "Love stronger than hate." It is addressed to the rabbi of the congregation. Signed: "Lucky"[last name redacted] "son of" [name redacted].

Diamante poem by Jesse [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.

Handmade card in watercolor on paper. The card features a hand painted illustration of various flowers , including red tulips, growing from the earth against a blue sky. The card reads in the upper center: "Stronger than hate."

Floral tag with peach-colored roses on the left. The tag contains a handwritten note reading: "Love conquers Hate!"

Handout on grief, trauma, and critical incident stress debriefing, 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.

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 a heart with various geometric and floral motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."