Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope contains the following handwritten message: "Peace and Comfort." The front cover reads: "LOVE." The inside reads: "Dear Family in God, There are not any adequate words to express the horror of what happened to you in your synagogue. May the love of God and those near and far begin to heal the hurt of your losses. Our heartfelt love and prayers are with you in fellowship. Peace and comfort to you.

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.

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."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the word: "Hope" surrounded by floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School." A sticker with the words: "Stronger Together" appears in the upper center.

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, as well as the stock signature: "From your friends at West Allegheny Middle School."

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The envelope features an illustrated heart. The front cover reads: "Peace" and features a sandy landscape with a blue sky and orange flowers. The inside reads: "May you find peace in God's love; and be able to go forward and heal in his Glory. Ann [last name redacted] St. Peters Episcopal Church Londonderry, NH."

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

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 are all praying for you. None of this should happen. Stay strong."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a turtle with floral and geometric motifs on its shell, legs, and neck. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11/4/18 and reads: "Dear Tree of Life Synagogue, Please accept our heartfelt condolences in the loss of your beloved congregation members, from our congregation at Point Loma Community Presbyterian Church in San Diego, CA. In LA, I grew up living next to a Rabbi (Marvin Bornstein) and his dear family. He was familiar with loss as well, having left medical school in Vienna at the onset of WW II. I learned from his example of love, tolerance and peace.

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."

Floral tag from floral arrangement sent by a group of six families. The tag commemorates the ten trees that were planted by the National Forest Foundation in memory of the October 27 attack victims. The note is printed on a tag with a beige background from a local florist.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated 11-4-2018 and reads: "Dear Friends, I wish I was there to put my arms around all of you but all I have is this paper and pen. May you sense comfort and care through these note and know that I and many more from the community in San Diego stand in solidarity with you and your community. We condemn such violence against God's children whom we all are on this earth and hope for a time of safety and peace throughout, soon!! God's peace, Sandy."

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter is dated Nov. 4 and reads: "Dear Tree of Life Members, We send our love and sympathy to you. We stand by you and all your global family for life. You are our brothers and sisters cherished our heritage through your and our future promises with you. With prayers and love, Rev. Dr. Larry [last name redacted]."

Unsigned card with handwritten note reading, "So sorry for your loss. Please know that ALL of Pittsburgh is UNITED with you! Much love [two heart symbols]."

Handmade card on white paper. Eleven trees, illustrated in blue ink, appear in the center. The number 11 appears below, followed by a heart. The card reads: "For the 11 people that died. Love, Coleman [last redacted]."

Red synthetic flowers with green leaves inserted into a cylindrical piece of synthetic moss. Wrapped in brown textured paper and tied with raffia bow.