Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a leaf with floral and geometric motifs. 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 reads: "From Point Loma Community Presbyterian Church, San Diego. Dear members of Tree of Life synagogue, Our hearts ache for your loss and we pray that God will give you peace and hope. We also pray that as a nation and as people of God, we can overcome this senseless hatred. We love you, Judy [last name redacted]."

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Card from the Friendship Circle of Illinois. The front cover of the card reads: "To the Jewish community of Pittsburgh sheyichyu (may they live)." The card reads: "I feel so bad for you from now and there should be no more bad stuff and moshiach (the Messiah) should come right now!" The acronym "B"SD" (with the help of heaven) appears on the upper right corner of the left fold. There are two illustrations of large smiley faces wearing t-shirts with smiley faces and yarmulkes (skullcaps) with the Hebrew word moshiach (the Messiah).

Post-it note with handwritten message in blue ink. The message reads: "We love you and support you." Color bleeding due to exposure to the elements at the Wilkins memorial.

Post-it note with a hand drawn illustration in red marker. An abstract heart appears in the lower center.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The cover contains a quote attributed to the ancient Chinese philosopher, Confucius: "Our greatest glory is not in never falling, but in rising every time we fall" in the upper left corner. The cover features a full-length illustration of a mountainous landscape with a deer at the center as the sun sets. The inside reads: "Dear Rabbi Jeffrey Myers, I am sorry that someone would ever do that. We're thinking about you all the way in Colorado. I'm a student in middle school. My name is Erin.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear Synagogue, Being God's chosen often includes incredible sacrifice. Too often you are chosen to be the sacrifice for us all. Thank you and bless you, [name illegible]."

Black and white photograph showing three women reading from a scroll. Pews and stained glass windows can be seen in the background.

Handwritten sign written in purple, orange, and red marker. The sign reads, "We will not forget you. Love will triumph."

Post-it note with handwritten message and illustration in blue, red, and black ink. The message reads: "Stronger Than Hate" and is accompanied by the adapted Steelers' emblem with blue and red diamonds and a Star of David.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dear members and brothers and sisters- May you each know that our prayers are with you. May you find peace through God's love. Sam W. May our God be gracious to you in your time of difficulty beyond difficulty. Our [?] God is yours. David [last name redacted]."

Hebrew mourning prayer, "Kel Male Rachamim" (God full of compassion) translated into English. The names of the eleven victims of the October 27 attack have been inserted here. Tears and 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 a bird with a leaf in its mouth and floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School."

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.

Printed note in black ink on white paper. The note reads, in capital letters: "Your Christian brothers and sisters are praying with you." Tearing and creasing due to exposure to the elements at the Wilkins memorial.

Sticker with Shabbat-related imagery. Two pink Shabbat candles, labeled in Hebrew: "Shabbat Shalom," appear in the center. Two women, covering their hands, as they bless the candles, appear on either side. Doves appear in the lower right and left corners. Signed lower left.

Card from a congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "I'm so sorry for you this is terrible the synagogue was bad. You're in my prayers!! Sincerely, Emma Pack , Holy Angels, Grade 4." Spelling errors corrected for clarity. Color bleeding due to water exposure at the memorial site.

Black and white laser print with the Stronger Than Hate symbol on the front; Pittsburgh Penguins symbol with Star of David on the back.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a bird feather with geometric motifs. The back contains a handwritten note, which reads: "I'm sorry for your loss and I know what it like to lose someone dear to you but it is ok they will always love you no matter where you or the[y] are. -Owen H." The stock signature: "From your friends at West Allegheny Middle School," appears upside down on the upper right.