Known as ‘Black Wall Street’ in the early 20th century, Tulsa’s Greenwood District was home to one of the US’s most prominent concentrations of African-American businesses. The 1921 Tulsa Race Massacre changed that but today, Black Tulsans have once again reclaimed a piece of Greenwood.

On an unseasonably warm and sunny February weekend in Tulsa, Oklahoma, the tidy brick buildings and clean streets in the Greenwood District are busy with families. Children’s laughter echoes through the air and you’ll probably spot the colorful Black Wall Street mural painted by local artist Chris “Sker” Rogers—but the orderly blocks hold no sign of the tragedy that occurred here a century ago.

In the early 20th century, Tulsa’s Greenwood District was known as Black Wall Street—the area had one of the most prominent concentrations of Black businesses in the United States. Greenwood was a bustling cultural and economic haven for Tulsa’s Black residents, home to a theater, restaurants, banks and doctors’ offices.

Within the 35 blocks of the Greenwood District, Tulsa’s Black community supported one another and thrived despite pervasive racism and segregation. But that all changed on May 31, 1921 when one of the worst instances of racial violence in the history of the United States occurred.