Starting with independence from the French in the 1950s and lasting until the era of the Khmer Rouge in the 1970s, Phnom Penh underwent tremendous growth as the capital city of a newly independent country. King Sihanouk was eager to present a new style of architecture and thus invigorate the process of nation building. A new golden era of architecture took off, with various projects and young Khmer architects, often educated in France, given opportunities to design and construct. This new movement was called "New Khmer Architecture" and was often characterised by a fusion of Bauhaus, European post-modern architecture, and traditional elements from Angkor. The most prominent architect was Vann Molyvann, who was nominated chief national architect by the king himself in 1956. Molyvann created landmark buildings such as the Preah Suramarit National Theatre and the Council of Ministers building. Other architects helped construct the newly founded Royal Khmer University, the Institute of Foreign Languages, and the National Sports Centre. With the growth of the upper and entrepreneurial middle Lady Penh, the city's founder.|alt=classes, new suburbs were built in the 1950s and 1960s. Although these buildings survived the Khmer Rouge era and the civil war, today they are under threat due to economic development and financial speculation. Villas and gardens from that era are being destroyed and redeveloped to make place for bigger structures. The landmark National Theatre by Molyvann was razed in 2008. A movement is rising in Cambodia to preserve this modernist heritage. Old villas are sometimes being converted into boutique hotels, such as the ''Knai Bang Chatt''.