sentences:  In January 2012 it was confirmed that the Louvre Abu Dhabi's new opening date would be 2015.Construction on the main phase of the museum began in early 2013 by a consortium headed by Arabtec, Constructora San José and Oger Abu Dhabi.This stage includes waterproofing and the two basement levels, along with four concrete pillars that will support the 7,000-tonne dome.