Collage with a hand drawn tree with black ink in the center. Leaves made of multicolored tissue paper; two ready-made decorative leaf in orange, yellow, and peach fabric. Handwritten messages on either side.

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.

Handwritten card from a student at Goddard Middle School in Littleton, Co. The front cover features the following quote attributed to the great ancient Roman orator, Cicero: "While there's life, there's hope. -Marcus Tullius Cicero." An illustration of a large Star of David appears below. The quote and illustration are outlined with a repeating pattern of blue and white lines. The inside reads: "Dear L'Simcha Congregation, My name is Olivia [last named redacted]. I live in Littleton, Colorado. I am Jewish.

Blue posterboard with a large cross overlaid with a Star of David in the center and hearts on the side. Inscriptions in each of the four corners. Dirt on the reverse due to exposure to the elements at the Wilkins memorial.

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.

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 inside reads: "...for your loss...[f]or you...Devon from CCD Hol[y] Ange[ls]...[mem]bers of the Tree of life."

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. 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.

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 featuring a quote from the Brazilian author Paulo Coelho, as well as the stock signature: "From your friends at West Allegheny Middle School."

Post-it note with handwritten message in blue marker. The message reads: "May their memories be a blessing. Love [heart] From Charlotte, NC." Tape on the upper edge.

Post-it note with handwritten message in black marker. The message reads: "What happened here will not be forgotten." Signed with a Star of David.

Handwritten note written in blue ink on lined paper. Addressed to the victims of the October 27 attack and their families. The note is signed by Natasha and reads: "I love you. I'm so sorry this happened to you." Staining and color bleeding due to exposure to the elements at the Wilkins memorial.

Handwritten condolence note written in black marker on yellow paper addressed to the congregants of the Tree of Life synagogue.

Print with various birds resting on the branches of a flowering tree folded in half to create an improvised card. The inside contains a handwritten sympathy note written in blue ink from a member of the autism community in Monroeville, Pa.

Handwritten note written in blue ink on a lined notecard reading: "Sending all of my sympathy, empathy and love. I don't know what else to say. -Hope [last name redacted]. Brooklyn, New York (Former Pittsburgher)."

Color photograph showing 13 people standing on either side of two Torah scrolls. Many of the men are wearing prayer shawls.

Paper program booklet with image of light blue sky on the cover. Typed text throughout booklet. Contains introductory remarks from Executive Director Dr. Zipora Gur, agenda for conference with summaries describing each presentation, biographies of presenters, descriptions of exhibits associated with the conference, resource lists, acknowledgements, and evaluation form.

Handmade card in purple, blue, green, and black ink on white paper. Signed by Talia, Jacob, and Jayden. Illustrated with small hearts throughout. Smudging and staining due to exposure to the elements at the Wilkins memorial.

Synthetic white orchid and bamboo stalk in brown square pot.