The Elbphilharmonie Hamburg is a concert hall under construction in the HafenCity quarter of Hamburg, Germany. The concert hall is designed by Herzog & de Meuron on top of an old warehouse (Kaispeicher A). It will be the highest inhabited building of Hamburg. On 2 April 2007 the First Mayor of Hamburg Ole von Beust, Henner Mahlstedt, Hochtief Construction AG, project coordinator Hartmut Wegener, Hamburg Minister of Culture Karin von Welck and architect Pierre de Meuron were laying the foundation stone in the warehouse Kaispeicher A. In 2007, the construction was scheduled to be finished in 2010 with an estimated cost of €241 million. In November 2008 as an endorsement to the original contract, the costs for the project were estimated at €450 million.