Post-it note with handwritten message in blue marker. The message reads: "Love and solidarity from the Bay Area."

Post-it note with handwritten message in red marker. The message reads: "Love Wins. Love and prayers from York, AA. T.B.I."

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.

White button with black text and safety pin on back, Design features tree with branches forming a Star of David. Text above design reads, "#pittsburghstrong."

Laminated prayer card with text of the "Prayer to Our Mother of Perpetual Help" on the reverse. The front side features a reproduction of a medieval-style icon of the Virgin and child against a gold backdrop. This prayer card has the imprimatur of the former archbishop of Boston, William Cardinal O'Connell (1859-1944).

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 black marker. The message reads: "Jersey strong supports #pittsburghstrong. God bless you all!"

Folded card with colored pencil illustration. Cover shows a tree. Inside reads: "I am so sorry for your loss. We are with you in spirit and in deed. As a former resident of Pittsburgh my heart breaks for you and your community."

Black and white photograph showing Rabbi Herman Hailperin and Cantor Joseph Levin wearing Jewish religious regalia standing at the bima of a sanctuary. Bima is flanked by bouquets of white flowers.

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 a sticker with the stock signature: "From your friends at West Allegheny Middle School."

Post-it note with handwritten message with blue marker. The message reads: "Love will always win..."

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 made by a student from the George Washington University Hillel. The card features a Star of David and reads: "Dear Pittsburgh, I miss you terribly. I miss my home now more then ever. I stand with my city and my Jewish community now and forever. I am sending all my love from DC."

Folded card with marker illustrations. Cover features two balloons with text "It's fine we are here with you." Interior features illustration of abstract diamond designs with text, "I'm saddened by the tragic attack on your community in Pittsburgh - and on all Jews. Please know that you are not alone, and have lots of support from good people near and far. L'shalom."

Typed letter on Alfred University letterhead in hardback certificate holder, signed by Alfred University President Mark Zupan.

Handmade paper cut out illustrated with pencil and marker in the shape of a clown. The reverse is signed: "Love, Liam."

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 your sisters and brothers and we stand with you today and every day. We love you and our prayers are with you." The church's contact information is included on the back of the envelope.

Note dated October 27, 2019 reading: "You can count on our prayers. Together we are stronger than hate. The Roman family." Illustration of a young child angel with wings bottom center.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover reads: "I am sorry" and features a large heart below. It is signed: "By D'mitri." The inside reads: "Dear survivors of the synagogue shooting, I AM sorry FOR your LOSS. This note is from D'mitri [last name redacted]. I live in Colorado."

Handmade card in colored pencil on paper. The outside features a series of staples running down the side and two hole punches. Cream-colored yarn is tied in a bow around the left-hand hole. From right to left, the inside reads, in Hebrew: "Zachor" (remember) and "Love, Cat Dog. Me and family are so sorry." Assorted hearts appear on the right flap; a group of multicolored blocks with a heart-shaped cat or dog face on top appears on the left. The back is signed, on the lower center: "From Aviva and Shosie."