Post-it note with handwritten message in blue ink. The message reads: "Stronger than hate." Illustrated with a peace symbol. Color bleeding and staining due to exposure to the elements at the Wilkins memorial.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a leaf with 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 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."

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of a mandala with floral motifs with the words "Good Luck" written below. The back contains a handwritten note, "Stronger Together" sticker, 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, in Hebrew: "May their memories be for a blessing. May their souls be bound with the bond of life. Sharon, Israel."

Magazine cutting with sparrow sitting on a tree branch on the front cover with the stock quote "dreamy, melancholic variations." Printed poem below and above the quote. Tear marks on the upper edge. Image of three women in long peasant skirts standing on a wooden floor around an illuminated candle.

Letter from a member of the Point Loma Community Presbyterian Church in San Diego, California. The letter reads: "My prayer- my prayer is for all the people affected to be at peace. Please Lord look after their friends and family, loved ones in this time of need. In God's name I pray. Amen."

Post-it note with handwritten message with blue marker. The message reads: "Never Forget. Love from D.C."

Turquoise envelope with handwritten inscription in black ink addressed: "To the Tree of Life." Staining due to exposure to the elements at the Wilkins memorial.

Floral tag from floral arrangement, which reads: "With Love from our Family to Yours [heart]." The note is written in black marker on rectangular piece of wrapping paper with brown and red stripes.

Floral tag from floral arrangement addressed to the Congregation and Staff at Tree of Life Synagogue. The message is printed on flower tag from a local florist. Creasing due to exposure to the elements at the Wilkins memorial.

Collage with a hand drawn tree in the center; leaves made of multicolored tissue paper. Handwritten messages in black ink and red crayon on either side of the tree.

Handwritten card written in pencil, blue and purple crayon, on paper. The note is from a seven year old child [name is illegible]. The note reads: "We won't forget how you spread kindness so we will do the same to the world. Be kind all around." An illustration of a globe appears below. Spelling errors corrected for clarity. Staining and tearing due to exposure to the elements at the Wilkins memorial.

Laminated text of the Catholic "Beatitudes" blessing printed on paper with light blue checkered pattern in background. A yellow band with the words "The Beatitudes" appears in the upper center; blue and purple clouds covering the sun appear to the left. A handmade paper medallion with five decoratively rolled spirals and a silver string has been taped to the front.

Floral tag enclosed in orange envelope from floral arrangement. The tag reads: "Love from your friends in Sewickley." The message is writtein black ink on a printed tag with a forest landscape; the "o" in "Love" is written as a heart. The reverse is stamped with the contact information fo Squirrel Hill Flower Shop.

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.

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.

Card from a student at West Allegheny Middle School in Imperial, Pa. The front features a hand-colored illustration of the word: "Hope" surrounded by floral and geometric motifs. The back contains a handwritten note, as well as the stock signature: "From your friends at West Allegheny Middle School." A sticker with the words: "Stronger Together" appears in the upper center.

Miniature New York State flag. Wrapped around stem of flag is a slip of laminated yellow paper reading, "In Memory of our Sister ROSE MALLINGER z''l -- To his family and community we pray Tanuchamo min hashamayim. May God in Heaven comfort you. The Principals, Teachers, Parents, Alumni, and Students of Magen David Yeshivah. Brooklyn, NY." Part of a series of 11 flags, each dedicated to one of the victims. Additional photograph shows the entire set of 11.

Printed tag with a photograph of Bernice Simon. The tag reads: "In Memory of Bernice Simon." Creasing and staining due to exposure to the elements at the Wilkins memorial.