This is one of the iconic hotels of Hawaii.  In 1925, the Territorial Hotel Company, decided to demolish the Honolulu Seaside and replace it with a large, modern resort.  The new hotel was named the Royal Hawaiian Hotel.

The sprawling pink Moorish complex, built at a cost of over $5 million, was surrounded by a fifteen-acre landscaped garden. The hotel was built roughly shaped like the letter "H" to catch the trade winds and featured 400 rooms, each with bath and balcony. The Royal Hawaiian opened its doors to guests on February 1, 1927.

During World War II, the Royal Hawaiian was closed to tourists and served as a place of rest and relaxation for members of the U.S. military. While the Royal Hawaiian's lush tropical garden was (and still is) tranquil and poetic, on the beaches fronting the Pink Palace  one saw reminders of the war with rolls and rolls of barbed wire planted in the sand. The hotel was sold, along with the rest of Matson's hotels in Hawaii, to the Sheraton Corporation in 1959.

In September 1974, Japanese businessmen purchased the Royal Hawaiian Hotel from ITT Sheraton, along with the  Sheraton Waikiki Hotel, Moana Hotel, Sheraton Princess Kaiulani Hotel, Sheraton Surfrider Hotel, Sheraton Maui Hotel, Sheraton-Palace Hotel, and Sheraton-West Hotel. The hotels that remain today are the Sheraton Waikiki, the Sheraton Princess Ka'iulani, the Royal Hawaiian, and the now Westin Moana Surfrider.

An extended renovation of the Royal Beach Tower was completed in 2010.
Credits to Wikipedia