The art depots and workshops had also become far too cramped. In 1993, a leak in the roof of the museum damaged several large paintings, among them pieces by Ellsworth Kelly and Julian Schnabel.[28] A competition to renovate the museum was first held in the early 1990s, with Robert Venturi beating Rem Koolhaas, Wim Quist, and Carel Weeber to the job. Venturi was replaced by Álvaro Siza Vieira in 1996.