Card with illustrated sunflower. Inscribed in ink with the following message: "Hate cannot break our Steel City." Signed: "equal [=] love [heart] Star of David."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the words: "Don't Stop Believing." The back contains a handwritten note and a sticker with blue text reading: "Stronger Together." The stock signature: "From your friends at West Allegheny Middle School" appears in the lower center.

Typed letter addressed to Jerry Rabinowitz from Louis D. Louis identifies himself as a gay patient of Rabinowitz during the 1980s. He thanks for Rabinowitz for his sensitivity and care. The letter is enclosed in a plastic page protector and has tape residue on the back from the Wilkins memorial.

Post-it note with handwritten message in green marker. The message reads: "You are not alone. [Heart]."

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: "Tree of Life Synagogue, We pray for you. May you have a good recovery and keep close to God. -Elizabeth, Holy Angels CCD."

Notecard with a large heart illustrated in red crayon. Signed: Shani [last name redacted], Philadelphia."

Card made by a student from the George Washington University Hillel. The front cover contains a bilingual Hebrew and English message: "Haverim (friends) in Pittsburgh" with a Star of David below. The inside (from right to left) reads: "Sending love, solidarity, and hope. Our community is the strongest in the world! -Sam, GWU student, Colorado Springs, CO, Temple Beth Torah."

Handmade card illustrated with multi-colored crayons on light purple paper. The front features a child's illustration of an animal, perhaps a horse, with its mouth open wide in the shape of the letter C. The back features a blob outlined in brown crayon and other undecipherable imagery.

Card made by a student from the George Washington University Hillel. Card reads: "We love you and are thinking of you. May we all see better days ahead. Love, GW Hillel."

Bilingual, laminated prayer card with the text of the Jewish "Traveler's Prayer" in English and Hebrew. This "Traveler's Prayer" card was purchased an Israeli Judaica website.

Folded card with marker illustrations, decorated with stickers. Front features illustration of animal with word bubble "Hi" surrounded by a feature, two balloons, and a kite. Interior features illustration of snowflake and cartoon faces inspired by five emoji stickers and the sender's name "Sadie [last name redacted for privacy]."

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 addressed to Dr. Jerry Rabinowitz reading: "Rest in Peace Dr. Rabinowitz. Sue [last name redacted]. Shalom."

Post-it note with handwritten message in blue ink. The message reads: "From strength to strength [Star of David]. With you from KBH and all of Virginia Beach."

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.

Glass vase with four blue and white star-shaped balloons and a miniature American flag. Handwritten in black marker on white balloon is "Love One Another Right Now" with two hearts. Attached to front of vase is typed note that reads, "For our beloved neighbors that worshipped at the Tree of Life Synagogue, with great sadness, but also with a recommitment to a world of justice, reason, and love - [redacted], Chatham University;-[redacted], Washington DC - [redacted], Fouzhou China- [redacted], Sao Paulo Brazil."

Floral tag from floral arrangement sent by Charles [last name redacted] and Abbi [last name redacted]. The tag reads: "Love, light, and perseverance. Charles [last name redacted] and Abbi [last name redacted]." The message is printed on a tag from a local florist.

Rectangular card from a student at Fountain Valley School in Colorado Springs, Co. Front reads: "Tree of Life" and features a Star of David and a peace sign. Back reads: "Dear members of Tree of Life: I'm a Chinese high school student who study in U.S. After I heard the news that what happened in Tree of Life at this weekend. I'm extremely shocked and I still cannot believe that. We really against the discrimination between the religions and I believe that hate is no allowed between religions.

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 must stick together in times like these because together we are STRONG and no one can take that away from us. Enzo."

Handwritten letter written in black ink on glossy, lined notebook paper. The author, who identifies themself as a Hindu, articulates their belief in the Hindu concept of the soul's eternal nature. They conclude their letter with a Hindu prayer transliterated and translated into English. Fading and spotting due to exposure to the elements at the Wilkins memorial.