Post-it note with handwritten message in blue marker. The message reads: "May you all rest in eternal peace. God Bless [heart]."

Post-it note with handwritten message in black marker. The message reads: "May their memories be a blessing." Signed with a heart and a Star of David.

Post-it note with handwritten message in black marker. The message reads: "Miss you [underlined]! Love and Hugs."

Post-it note with handwritten message in green marker. The message reads: "Love is all you need!" The "o" is written as a heart.

Post-it note with handwritten message in black marker. The message reads: "We will be better." Minor staining due to exposure to the elements at the Wilkins memorial.

Metallic red rose with wire stem attached to a rock base.

Card made by a student from the George Washington University Hillel. Card reads: "Praise the Lord, all you nations, extol Him, all your peoples for great is His love toward us. And the faithfullness of the Lord endures forever. Praise the Lord." This message is an English rendering of Psalms 117:1-2.

Prayer card with reproduction of "The Miraculous Icon" depicting the Virgin and Child. According to the text on the front cover, this prayer card was blessed at mass with holy water and incense. The inside features various recommended prayers for healing and petitions.

Post-it note with handwritten message in blue marker. The message reads: "I pray to you and remember you always. May your soul rest in peace." Tape affixed on the upper center.

Post-it note with handwritten message in blue ink. The message reads: "You are not alone. We are all with you."

Post-it note with handwritten message in blue ink. The message reads: "We are here."

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."

Piece of notepad paper with a pencil drawing of a flying angel with wings and a halo.

Card made by a student from the George Washington University Hillel. The card features a Star of David and reads: "Dear Pittsburgh, I miss you terribly. I miss my home now more then ever. I stand with my city and my Jewish community now and forever. I am sending all my love from DC."

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 reads: "We are with you, our brothers and sisters. Stand strong within your faith- unyielding, unshakeable. Do not despair." The church's contact information is included on the back of the envelope.

Blank pink envelope with tape affixed on the reverse. Staining and fading due to exposure to the elements at the Wilkins memorial.

Laminated printed sign which reads: "Peace, Diversity, and Connection" over a photograph of a sunset on a rocky seashore.

Handwritten note written in black marker on dotted graph paper. The note reads: "Pray for the dead and fight like hell for the living." Creasing and staining due to exposure to the elements at the Wilkins memorial.

Post-it note with handwritten message in blue marker. The message reads: "As a result of this hate, I'm committing to discovering my Jewish identity and am doing micro-kindness."

Printed note in black ink on bright green paper. The note reads: "Hate has no home here. Our hearts are heavy with grief." Tape marks visible on the right and left sides of the note. Color bleeding due to exposure to the elements at the Wilkins memorial.