the largest in the city when it opened in 1865. The Savoy, perhaps London's most famous hotel, opened in 1889, the first London hotel with en-suite bathrooms to every room. Nine years later Claridge's was rebuilt in its current form. Another famous hotel, the Ritz, based on its even more celebrated namesake in Paris, opened in 1906. The upper end of the London hotel business continued to flourish between the two World Wars, boosted by the fact that many landowning families could no longer afford to maintain a London house and therefore began to stay at hotels instead, and by an increasing number of foreign visitors, especially Americans. Famous hotels which opened their doors in this era include the Grosvenor House Hotel and The Dorchester. The rate of hotel construction in London was fairly low in the quarter-century after World War II and the famous old names retained their dominance of the top end of the market. The most notable hotel of this era was probably the London Hilton, a controversial concrete tower overlooking Hyde Park. Advances in air travel increased the number of overseas visitors to London from 1.6 million in 1963 to 6 million in 1974. In order to provide hotels to meet the extra demand a Hotel Development Incentive Scheme was introduced and a building boom ensued. This led to overcapacity in the London hotel market from the late 1970s to the mid-1980s. Construction then picked up again, but it was soon curtailed by the recession of the early 1990s and the reduction in international travel caused by the 1991 Gulf War. The 1980s saw London (along with New York) start the trend of smaller boutique-style hotels. In the mid-1990s, many new hotels were opened, including different types from country-house-style hotels in Victorian houses to ultra-trendy minimalist premises. At this time, some of London's grandest early-20th-century office buildings were converted into hotels because their layouts, with long corridors and numerous separate offices, were incompatible with the preference for open-plan working, but their listed status made it hard to get permission to demolish them. This period also saw the opening of the first five-star hotel in London south of the River Thames, the Marriott County Hall Hotel, and the first two in East London, the Four Seasons Canary Wharf and the Marriott West India Quay, which is also close to the Canary Wharf development. For many years, there