Printed floral tags from floral arrangements sent by Shadyside Presbyterian Church.

Post-it note with handwritten message in blue ink. The message reads: "You are not alone. We are all with you."

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.

Folded card with crayon illustration. Cover features heart surrounded by circles and name Max. Interior reads "Things do get better. I am sorry for the 11 killed and their families. But the world's not over. How will you bounce back from the tragedy. You guys are really strong sticking through the tragedy." Second note reads. "We are with you! Michele."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird with a leaf in its mouth and 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."

Prayer card with reproduction of "The Miraculous Icon" depicting the Virgin and Child. According to the text on the front cover, this prayer card was blessed at mass with holy water and incense. The inside features various recommended prayers for healing and petitions.

Post-it note with handwritten message in blue marker. The message reads, in Hebrew: "May their memories be for a blessing. May their souls be bound with the bond of life. Sharon, Israel."

Floral tag from floral arrangement sent in honor of the congregation at Tree of Life Synagogue. The note is printed on a tag with a beige background from a local florist, Oliver Flower Shop.

Floral tag enclosed in pink envelope from floral arrangement; tape on the lower left front. The tag reads: "You will never be forgotten. Each and every one will live in our memories forever." The note is written in black ink on a printed tag with a floral bouquet in the lower right corner. The reverse is stamped with the contact information for Squirrel Hill Flower Shop.

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: "We are with you, our brothers and sisters. Stand strong within your faith- unyielding, unshakeable. Do not despair." 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: "You are God's chosen people. He loves you so much and so do we. We pray that love wins in your synagogue every day. God bless, The Church at Severn Run." The church's contact information is included on the back of the envelope.

Post-it note with illustrations in red marker. A cascading stream of hearts, outlined in red, begins in the upper left corner and extends to the lower right corner.

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Card with gold background and illustration of a rose bud stem with leaves. The message inside is addressed to the members "who were, are, and will be part of the Tree of Life synagogue" and affirms the sender's solidarity and God's greatness.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "My heart aches for all of your community of faith who have suffered such a senseless and tragic loss. Please know that we, who have faith and hope in God, know that you are not alone. We are with you. Please accept my heartfelt sympathy. I pray for your peace. Shalom, Sarah."

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."

Single sheet folded in half. Contains photocopy of two pages from the "Readings: Prelude to Kaddish" section of the Kol Haneshamah Shabbat Vehagim prayerbook. One side contains the poem "Each Of Us Has a Name" in English and Hebrew. Other side contains "In Many Houses" by Diane Cole and "To open eyes when others close them" by Emmanuel Eydoux.

Bright yellow posterboard with handwritten message written in green marker and pencil reading, "We love you neighbors." Embellished with four hands with additional handwritten messages and hearts.