Floral tag from floral arrangement, which reads: "With Love from our Family to Yours [heart]." The note is written in black marker on rectangular piece of wrapping paper with brown and red stripes.

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 contains an illustrated tree surrounded by hearts. The tree is labeled "Tree of Life" on the branches and "Synagogue" below. The card reads: "Tree of Life, I am so sorry for your loss. We will pray and keep you in our thoughts and prayers. We will continue to pray for you at the nights come. Have a great day! Love, Natalie T. Holy Angels CCD, 6th grade."

Large square card from a student at Fountain Valley School in Colorado Springs, Co. Card reads: "Dear members of Tree of Life synagogue, My name is Shi Dao [last name redacted]. I'm from a city in North-East China. I am sorry this tragedy happened. My deepest condolences. May peace be with you. Nov. 5, 2018. From a Chinese in Colorado."

13-page program. Black text on blue paper. Contains selection of readings and prayers as part of a "Sabbath of Learning" service.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "You are in our thoughts and prayers knowing our Karla was living in your neighborhood has helped us so much-"

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "We feel your loss! We feel your pain! We pray for you and with you!"

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

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a turtle with floral and geometric motifs. The back contains a handwritten note, a "Stronger Together" sticker, as well as the stock signature: "From your friends at West Allegheny Middle School."

Post-it note with handwritten message in green marker. The message reads: "Never again! We love you." Tape on the upper edge. Tearing and creasing due to exposure to the elements at the Wilkins memorial.

Post-it note with handwritten message and illustration in black marker. The note is signed: "[heart] Dorothy" and features two abstract circle and oval shaped illustrations.

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.

Note written in black and blue ink on bright pink notecard with a quote from Psalm 29:11 and the phrase "Stronger Than Hate." Star of David left center. Green staining on right edge due to exposure to the elements at the Wilkins memorial.

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The front cover reads: "Peace" and features a sandy landscape with a blue sky and orange flowers. The inside reads: "May your loved ones be held in the loving arms of God. I pray for your friends and families that they may find peace."

Card with colored pencil illustration. Cover features an illustration of a leafy tree with pink asterisk-shaped stars, labeled: "The place where new life can grow." Inside reads: "Baruch dayan ha'emet" in English and Hebrew, and "I am sorry for your friends and families loss. I know what it feels like. So I am sending all the way from Texas this blessing." The back is signed: "Miriam." Spelling errors have been corrected in this transcription.

Zine page with bubble letters and information about the emotional value of hugs. Zine page with cartoons illustrating the emotional value of hugs, including a superhero, labeled "Hugs to the Rescue" and a young couple.

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: "Tree of Life, I'm sorry that your synagogue has lost many lives on Saturday morning. You are all in my prayers. With love, Maeve [last name redacted] 6th Grade."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4, 2018 and reads: "Dear Members of the Tree of Life Synagogue, An attack on your community of faith is an attack on all of us. We stand with you from afar, and renounce the hatred that brought that madman to your door. Our pastor, Karla Shaw, will deliver this letter (and many others) as a sign of our solidarity with your community. This is a tangible sign of our prayers for your community- for peace, for protection, for security, for understanding.

Post-it note with handwritten message in red marker. The message reads: "Stronger than hate. Never forget the day."

Post-it note with handwritten message in black marker. The message reads: "When we work together, hate can't win. -Max S."

White posterboard with handwritten messages of support from the Thornhill Rebels in Toronto.