Post-it note with handwritten message in black marker. The message reads: "Love is stronger than hate." Signed with a heart.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Tree of Life, Love always wins. We are with you. Blessings, Dolly and Stan [last name redacted]."

Post-it note with handwritten message in blue marker. The message reads: "God is love. Love beats hate any day." Signed by Cecelia [last name redacted]."

Wooden pedestal painted white with white Star of David and red heart affixed to front. Handwritten in pencil and black marker on the Star of David is the name "Richard Gottfried." (The name is misspelled as "Richard Guttfried.") Collaged onto the heart are white pieces of paper and a translation of Psalm 34:18: "The Lord is close to the broken hearted and saves those who are crushed in spirit." Accompanying image shows all 11 Stars of David in the series.

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: "There can't be light without the dark. We are praying for your safety and peace. Holy Angels CCD." Spelling errors corrected for clarity.

Floral tag from floral arrangement addressed to Jerry sent by Darlene [last name redacted]. The tag reads: "To Jerry, Will always remember your kindness and compassionate bedside manner at SSH [Shadyside Hospital]. Love, Darlene [last name redacted] RN." The note is handwritten in black ink on white paper with a watermark in the lower center.

Post-it note with handwritten message in blue marker. The message reads: "We love you. Love, Sophie."

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 of a bird with a leaf in its mouth 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: "Dear Members of the Tree of Life Synagogue- My thoughts and prayers are with you as you grieve the loss of 11 of your friends, family, and members. The members of my church, Point Loma Community Presbyterian Church in San Diego, California have been praying for your congregation. We hope and pray that over time your hearts will heal and peace will enter to fill the void left by the 11. El."

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

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

Handmade, screen-printed card on red paper with blue paint. A heart appears in the center. Signed, lower right: "Love, Brian S." The card has been laminated. A piece of clear tape appears on the back.

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 prayers for healing and comfort. The church's contact information is included on the back of the envelope.

Post-it note with handwritten message in blue ink. Written in Hebrew, the note contains an adaptation of the biblical verse in 1 Samuel 15:29. Translated into English, the message reads: "The Glory of Judah does not deceive or change His mind..." Color bleeding due to exposure to the elements at the Wilkins memorial.

Pink card with a large heart with the words "Rose-Ferree Street misses you" inside.

Post-it note with handwritten message in blue marker. The message reads: "May your memory be for a blessing. Sending love and healing from Jews in Berkeley, CA." Signed with a Star of David.

Post-it note with handwritten message in black and red marker. The message reads: "If you mess with us. You mess with the entire world." Signed with a heart, colored in red and outlined in black.

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 the sender's prayer for peace, love, and unity. The church's contact information is included on the back of the envelope.

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.