On January 19, 2005, the philanthropist Peter B. Lewis resigned from his position as chairman of the foundation, expressing his opposition to Krens' plans for further global expansion of the Guggenheim museums. Lewis had been the largest donor in the history of the Guggenheim. Tensions continued, however, and on February 27, 2008, Krens resigned from his position in the foundation. He has remained, however, as an advisor for international affairs. Over his two decades at the head of the foundation, Krens was criticized not only for the deaccessioning of older works of the museum but for both his businesslike style and perceived populism and commercialization. One writer commented, "Krens has been both praised and vilified for turning what was once a small New York institution into a worldwide brand, creating the first truly multinational arts institution. ... Krens transformed the Guggenheim into one of the best-known brand name in the arts."