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 love, prayer, and affirmation of God's goodness. 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 reads: "God Bless You." The church's contact information is included on the back of the envelope.

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

Hand painted sign with white, black, and red paint on cardboard with the word "Hate" crossed out with a red slash inside a red circle.

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 healing and comfort. The church's contact information is included on the back of the envelope.

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 Synagogue, We are sorry to hear about this tragedy, and we hope peace is to come. We have been thinking and praying for everyone. Sincerely, Holy Angels. -Rylee. 6th grade." Spelling errors corrected for clarity.

Page of blank stationery. Navy blue printing on white paper. Header read, "Congregation Oher Chodosh 79-81 Roberts Street, Pittsburgh, Pa. 195_."

Card from the Friendship Circle of Illinois. The front cover of the card reads: "To the Jewish community of Pittsburgh sheyichyu (may they live)." The card reads: "I feel so bad for you from now and there should be no more bad stuff and moshiach (the Messiah) should come right now!" The acronym "B"SD" (with the help of heaven) appears on the upper right corner of the left fold. There are two illustrations of large smiley faces wearing t-shirts with smiley faces and yarmulkes (skullcaps) with the Hebrew word moshiach (the Messiah).

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: "I send you all of my sorrowness, and I pray for the victims of the shooting."

Post-it note with handwritten message in black marker. The note is written: "Heartbroken with all of you."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "My prayers are with you all during this unbelievable time of sadness for all of you in this congregation. I was so touched by the love... a beautiful outpouring of love, that you shared with one another during the vigils. The entire community is praying for all of you, and I hope that you are feeling surrounded by our love and prayers! Praying also for peace in our world! Kirsten, with love and blessings."

Floral tag addressed to Joyce Fienberg. The tag features a white rose on the left and the stock message: "With Deepest Sympathy" in a band on the upper center.

Laminated copy of poem by Sandra Sturtz titled "May You Always Feel Loved." Poem is printed in black ink with two flowers in the upper right and left corners. Photograph of a sunset over a rocky sea shore in the background.

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.

Laminated printed tag with the contact information for David [last name redacted], a dentist from the Pittsburgh area.

Post-it note with handwritten message in blue marker. The message reads: "R.I.P. we will fight for you. [Heart]."

Floral tag from floral arrangement addressed to Tree of Life synagogue. The message is printed on a tag from a local florist.