Post-it note with handwritten message in black marker. The message reads: "No words! RIP." Stain in the upper right corner due to exposure to the elements at the Wilkins memorial.

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.

Post-it note with handwritten message in green marker. The message reads: "Love Wins [heart]."

Handwritten note written in black marker on recycled paper. The note reads: "Blessed are those that mourn for they shall be comforted. We grieve with you. Squirrel Hill Neighbors." Tearing due to exposure to the elements at the Wilkins memorial. The back of the note has the silhouette of a box with two circles on a grey background.

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.

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

Bilingual note written in black ink on lined notebook paper. The message reads in both Hebrew and English: "You are Loved. You are not forgotten." Signed with a Star of David.

Handwritten letter written in black ink on lined notebook paper from Michelle. Michelle is a lifelong Pittsburgher whose mother worked in Squirrel Hill when Sophie Masloff, Pittsburgh's first Jewish and female mayor, was in office. Michelle recalls her mother's pride in serving Masloff. Michelle notes that she is a student at the University of Pittsburgh and currently lives in Squirrel Hill. She apologizes for being "neglectful" of her ties with the Jewish community. She wrote this letter to extend "my very friendly hello" and to communicate her solidarity.

Card with illustrated sunflower. Inscribed in ink with the following message: "Hate cannot break our Steel City." Signed: "equal [=] love [heart] Star of David."

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.

Natural red rose preserved in plastic box.

Handwritten note written in blue ink on lined notecard expressing the author's wish that all the victims of the October 27 attack find peace and that God will ease the suffering of those lose who lost loved ones.

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: "Faith is the friend that comes along when things just seem to go all wrong." The inside reads: "To the Tree of Life, My thoughts and prayers are with yours. Nancy [last name redacted]."

Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The front cover reads: "Peace" and features a sandy landscape with a blue sky and orange flowers. The inside reads: "May your loved ones be held in the loving arms of God. I pray for your friends and families that they may find peace."

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

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."

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: "May God keep our men and women safe! We are praying 4 u!!!"