Handout on grief, trauma, and critical incident stress debriefing, which was sent with the materials from Emergency Ministry Services, a faith-based training and disaster response NGO in San Juan Capistrano, Ca., affiliated with the Orange County Church on the Rock.

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 love you! God is with you always!" The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in blue ink. The note is written in Hebrew. Translated into English, the message reads: "May their memories be for a blessing. May God avenge their blood."

Patch featuring logo of Pittsburgh Penguins adapted to resemble a Star of David above the words "Stronger Than Hate."

Note addressed to Jerry Rabinowitz written on the back of a business card from Doug [last name redacted], a certified Pilates instructor in the Pittsburgh area.

Print out with the names of the eleven victims of the October 27 attack. Photographs have been included for Joyce Fienberg, Richard Gottfried, Rose Mallinger, Jerry Rabinowitz, David and Cecil Rosenthal, Daniel Stein, and Melvin Wax. The names and photographs are accompanied by the following message: "In Loving Memory, Gone But never forgotten." Tears and creasing due to exposure to the elements at the Wilkins memorial.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/2018 and reads: "June [last name redacted] My sincere heartfelt condolences to my Jewish family. This is a really heartfelt and sad time for me as Jews from Philadelphia sponsored me into this beautiful country allowing me to become a permanent resident. I lived with them for 18 months and raised their daughters as her nanny house keeper.

Floral tag from floral arrangement sent by a couple from Virginia. Handwritten message in blue ink on a printed tag featuring a white orchid on the lower right.

Floral tag from floral arrangement sent by Daniel Mulhall, the Irish ambassador to the United States, on behalf of the people of Ireland. The note is printed on a tag with a beige background from a local florist.

Post-it note with handwritten message in red marker. The message reads: "We will love you forever." Creasing 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 of the words: "You Got This" surrounded by a border with a grapevine pattern. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Collage with a hand drawn tree in the center; leaves made of multicolored tissue paper. Handwritten messages in black ink and red crayon on either side of the tree.

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 support, love, and prayer. The church's contact information is included on the back of the envelope.

White posterboard with an illustration of the Pittsburgh skyline and various handwritten messages. The names and ages of the eleven victims of the October 27 attack appear on the left, followed by the acronym "RIP" (Rest in Peace). The inscription, "You can't break a city made of steel," appears in the upper center. The words, "Pittsburgh is are (our) city," appears below with an arrow pointing to an illustration of one of Pittsburgh's iconic yellow bridges; "Never forget 10-27-18" appears underneath.

Post-it note with handwritten message in black marker. The message reads: "We wish you peace and love from NY. The Brodys."

Laminated mixed media collage with paper, dried leaves, and marker. Tree in the center; two clouds and sun in upper register. Handwritten inscriptions in various marker colors on tree trunk and upper left. Minor bleeding to back and signs of water exposure; creasing.

Envelope containing letters written by members of the Point Loma Community Presbyterian Church in San Diego, California. The envelope is labeled with a piece of paper reading: "Letters for Tree of Life Synagogue."

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

Oral history of Rosalind Chow, recorded as part of the Meanings of October 27th Oral History Project.

Handmade sign on cardboard written with black marker reading: "Hate has no home here."