Post-it note with handwritten message in green marker. The message reads: "You are not alone. [Heart]."

Post-it note with handwritten message in blue ink. The message reads: "Find strength in community today and hope for a better tomorrow." A heart appears between the third and fourth line on the right.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "Dearest sisters and brothers in the Lord, I just wanted to encourage you in the midst of all this tragedy and sadness that God will rise up among the carnage and be glorified through such honor and sadness. He is alive and well, and I know it doesn't feel like He is among you. He is and He will reign forever and be there with you in these hard times. He loves each and every one of you and has a plan for all of this.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The front cover of this card features a heart with the words "God is love." The inside reads: "May you find God's comfort in knowing we are with you in spirit- May the spirit of God stir in the souls of all on our earth to stop the violence against God's people. We want peace on earth and it starts with us knowing our God of peace and love. God bless you and your whole community of believers. Pt Loma Community Pres. Church Loves you all."

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]."

Folded card with marker illustration. Front and back cover features illustrations of heart superimposed on tree. Interior features illustration of two figures beneath word bubble "Freedom!" and nine balloons.

Post-it note with handwritten message in blue marker. The message reads: "R.I.P. Dr. Rabinowitz."

Post-it note with handwritten message in blue marker. The message reads: "No hate. Just love." A heart appears below. Signed: "Columbus, OH."

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.

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

White envelope with handwritten message in black ink, reading: "In Greatest Sympathy to Residents of Squirrel Hill and Tree of Life Community and Jewish people throughout the world." Staining, creasing, and tearing on the edge due to exposure to the elements at the Wilkins memorial.

Glass, blue stone and blue handwritten post-it-note. The post-it-note reads: "God help these families and community. 'Hitherto hath the Lord helped us.' (1 Samuel 7:12). Raise an Ebenezer in Pittsburgh. RIP 11 lovely souls." The back reads: "The Ebenezer is the stone of help."

Metal sculpture in the shape of a tree feature two-lobed fan-shaped leaves. Sculpture is attached to a circular base and tied with a gold ribbon.

Miniature Israeli flag attached to a flat stick. Stick features logo of the Eagles' Wings organization. Hand-drawn in red on stick is a heart and handwritten note reading, "We Christians love the Jews." Rosary with a Miraculous Medal wrapped around stick.

Oral history with Gemma Del Duca recorded as part of the Meanings of October 27th oral history project.

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.

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. Due to water exposure at the memorial site, the message in this card has been partially erased. The remaining text reads: "[?] of Life members... praying for you. Sorry for you[r] loss. [G]od bless you! Love and prayers, Holy Angels CCD." Spelling errors corrected for clarity.

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.

Floral tag from floral arrangement, which reads: "Friends of fallen victims." Message written in black marker on printed tag with a red rose on the left.