A nonprofit celebrated the anniversary of the 9/11 Memorial Museum with a large art donation.

Museum officials unveiled artwork donated by the group ArtAID during a ceremony Thursday.

The collection was inspired by the aftermath of the September 11th attacks.

The collection's creator says it began shortly after the attacks when he created an image of an angel for firefighters near his Greenwich Village home. Since then, Keith De Cesare says it has become an icon of healing.

"I live in the Village. I saw the towers go down. We were all impacted. People like me needed to do something," De Cesare said.

"The donation today actually represents the opportunity for the museum to preserve arguably the first Ground Zero memorial that was created at the site," said Jan Ramirez, chief curator and director of collections for the 9/11 Memorial Museum.

The donation includes De Cesare's original angel image from the World Trade Center's South Tower.

The art installment is the largest archival collection of September 11th public service art ever to be donated.