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."

Tri-fold bulletin listing the details of Shabbat services, upcoming community events and resources for those experiencing symptoms of trauma.

Floral tag from floral arrangement sent by Eddie and Diane in memory of Al Hess. The note is printed on a tag with a beige background from a local florist.

Cover of bencher (grace after meals booklet) from the bar mitzvah of Nate Itskowitz. Features illustration of a black and yellow sports jersey with the name Itskowitz, a Steelers logo modified to read "Nate" and the date "10-27-18," and Hebrew text listing the event and date.

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

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

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.

Single page with typed text and hand-drawn illustration of an open Torah scroll, Shabbat candles, and a kiddish cup. Text lists details of event and includes quotation from Statement of Principles.

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 from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration a pineapple with floral and geometric motifs, surrounded by hand drawn hearts. The back contains a handwritten note, "Stronger Together" sticker, as well as the stock signature: "From your friends at West Allegheny Middle School."

Engraved aluminum medallion attached to gray ribbon. Medallion features engraving of Pittsburgh skyline, bordered by design resembling bridges and the words "Stronger Than Hate." Accompanying card provides context for medallion against a yellow and white gradient with black text. Includes quotation from Dr. Martin Luther King, Jr.

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.

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.

Miniature New York State flag. Wrapped around stem of flag is a slip of laminated yellow paper reading, "In Memory of our Sister ROSE MALLINGER z''l -- To his family and community we pray Tanuchamo min hashamayim. May God in Heaven comfort you. The Principals, Teachers, Parents, Alumni, and Students of Magen David Yeshivah. Brooklyn, NY." Part of a series of 11 flags, each dedicated to one of the victims. Additional photograph shows the entire set of 11.

Post-it note with handwritten message in blue ink. The message reads: "We love you. We are here for you." Color bleeding 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 reads: "Dear Tree of Life members, You have all been in my heart and prayers this past week. It is impossible to imagine what you all must have experienced, but I would hope that your faith and strong community would be very healing at this time. I am so impressed with the response of your congregation- to just keep going, as the Jewish people have done for thousands of years throughout history.

Folded card with marker illustration. Cover shows a Star of David in the center, surrounded by six hearts. Inside features a tree and reads: "May you all be surrounded by love at this difficult time." Back features a Star of David encircled by a heart.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Our dear brothers and sisters at Tree of Life, You are not alone! I pray that God, our father, will fill you to overflowing with His peace and love as you mourn the loss of your family. May you find comfort in the knowledge that even in this tragedy God is in control and will bring beauty from the ashes. 'My comfort in my suffering in this: Your promise preserves my life.' Psalm 119:50."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "You are in our thoughts and prayers knowing our Karla was living in your neighborhood has helped us so much-"