It was budgeted at 1.9B (in 2019). Most of the cost overruns are from unexpected site issues like asbestos (more than thought) and water table problems. The buildings are historic, they already had marble. The marble was taken down and saved, this marble will be re-used. Some pieces are damaged, those will be new marble. These buildings are near 100 years old. I also don't think they have marble floors, but facades and other stonework.