Bloomberg has been among a few outspoken elected officials supporting the plans for an Islamic center and mosque two blocks from ground zero.
On Friday, President Barack Obama also backed the right for the developers to build a mosque there. He added over the weekend that he was not commenting on the wisdom of building a mosque close to ground zero.
Some have said it is insensitive because the terrorists who struck the buildings in 2001 were Islamic extremists.
Bloomberg applauded Obama on Monday for backing the mosque. He declined to read what he called nuances into the president's additional remarks on Saturday.