Post-it note with handwritten message in blue marker. The message reads: "We will not be bystanders. We will take action. All of us have a role to play. Everyone can help."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Hello, Dear Friends- I am a visitor at this church today- as the wife of a Catholic with a Jewish son-in-law and a nephew who lives on Squirrel Hill Ave- I just had to send some Presbyterian prayers as you grieve and recover. We are all the Family of God! Love and blessings- Mary Ellen [last name redacted]."

Card addressed to Rose Mallinger, written using personal details from various public sources.

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-"

Single page with typed text and hand-drawn illustration of an open Torah scroll, Shabbat candles, and a kiddish cup. Text lists details of event and includes quotation from Statement of Principles.

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 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 are praying you. We don't deserve this [heart symbol]. Nicole [heart symbol]."

Note from a member of The Church at Severn Run in Severn, Maryland. The note reads: "I'm sending you love during this most difficult time. I'm praying for you all. God loves us all and I hope you all will feel his amazing love during this trying time. My heart hurts at this time for you all. I love you! Pam."

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 affirms the sender's belief in God. The church's contact information is included on the back of the envelope.

Hand painted sign on paper cutout with various motifs, including Stars of David, the Stronger Than Hate Steelers' logo with the Star of David, and a peace symbol. The word, "love" is written in white ink with a streak of blue and white paint.

Handwritten note in pencil on paper. The note, written in bubble letters, reads: "Stronger Than Hate." Illustrated with the adapted Steelers emblem with two diamonds and a Star of David. Creasing and fading due to exposure to the elements at the Wilkins memorial.

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

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a mandala with other 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: "Dear Members of the Tree of Life Synagogue, Although I am a Presbyterian, I have Jewish ancestors. I was so saddened by the tragedy your congregation has [?]. May you have the blessings of the Lord, and may the ones you have lost rest in peace. William H. [last name redacted] San Diego, CA."

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

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.

Handwritten note written in black ink on cream colored paper with a rose and rose bud illustrated in the upper left and lower right corners, respectively.