Hotels By Pierre Cardin

In 2006, Guinness World Records listed the First World Hotel in Genting Highlands, Malaysia as the world's largest hotel with a total of 6,118 rooms. Similarly, the Venetian Palazzo Complex, in Las Vegas, has the most number of rooms. It has 7,117 rooms followed by MGM Grand Hotel, which contains 6,852 rooms.
Oldest
According to the Guinness Book of World Records, the oldest hotel still in operation is the Hoshi Ryokan, in the Awazu Onsen area of Komatsu, Japan which opened in 718.