Hallmark card from a member of St. Peter's Episcopal Church in Londonderry, New Hampshire. The inside reads: "Please know that you are in our thoughts and prayers. St. Peter's Episcopal Church Londonderry, NH."

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 contains messages of love and support. The church's contact information is included on the back of the envelope.

Hardwritten card in blue pen on white paper, offering condolences following the October 27 attack.

Card featuring reproduction of a nineteenth century Japanese woodblock print depicting the grounds of the Kameido Tenjin Shrine in Tokyo, Japan. Interior includes handwritten note from two individuals who identify as a Catholic and a baptized Episcopalian, respectively.

Card with a peace sign, Star of David, and heart illustrated in marker on the front cover. The inside contains a heartfelt message from a Jewish student at Marjory Stoneman Douglas High School in Parkland, Fl. The student articulates their motivations as follows: "I feel connected to your community in a way I cannot describe. I can only tell you to stand together, and we will stand with you as well..." Some words have faded due to water exposure at the Wilkins memorial.

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: "Our thoughts and prayers are with you all. God is with you always. God Bless." The church's contact information is included on the back of the envelope.

Card from two families in Edgewood, Pa. Front cover shows an illustration of two hands holding a cat's cradle yarn configuration with stars. Message expresses thanks to victims and their families.

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 four men holding Torah scrolls, alongside fifth man and boy. Label taped to photograph reads, "________, __________, Elovitz brothers, Dr. Weisberg."

Handwritten card written in pencil on paper. The card reads: "Dear Family, Hello my name is Elisha D. I am from Netivot, we stand together with you because a loss for you is a loss for us. May you only see simchas."

Post-it note with handwritten message in blue ink. The message reads: "We love you and support you." Color bleeding due to exposure to the elements at the Wilkins memorial.

Folded card with marker and colored pencil illustrations. Front and back both feature Stars of David encircled by hearts. Inside shows a tree and a cat and is signed "Will".

Post-it note with handwritten message in blue ink. The message reads: "We love you. We are here for you." Color bleeding due to exposure to the elements at the Wilkins memorial.

Post-it note with handwritten message in black ink. The message reads: "We stand with you, always, with prayer and love."

Post-it note with handwritten message in blue marker. Tape in the upper left corner. The message reads: "This Temple's response to all this hate is beautiful. Hate is not welcome here or anywhere! My blessings to all."

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 congregant at the Holy Angels Parish. The front cover contains a stock illustration of a haloed dove flying in front of Noah's ark. The inside reads: "I am sorry for your loss. From: Holy Angels CCD."

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 pineapple 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."