The University of Notre Dame is delaying its plan to cover up 19th century murals depicting Christopher Columbus in America that have long been criticized for their stereotypical images of Native Americans and blacks submissively posing before white European explorers.

The Catholic university based in South Bend, Indiana, announced in January that it would conceal the offending artwork. The decision came after students, employees and alumni signed a campus letter in 2017 that called for the removal of the murals, which have been displayed in the campus’ Main Building since 1884.