The Westin Book Cadillac Detroit is a historic skyscraper hotel located at 1114 Washington Boulevard in Downtown Detroit, Michigan, within the Washington Boulevard Historic District.
 Designed in the Neo-Renaissance style, and constructed as the Book-Cadillac, it is part of Westin Hotels and embodies Neo-Classical elements and building sculpture, incorporating brick and limestone.
 Among its notable features are the sculptures of notable figures from Detroit's history—General Anthony Wayne, Antoine Laumet de La Mothe, sieur de Cadillac, Chief Pontiac, and Robert Navarre along the ornate Michigan Avenue façade and copper-covered roof elements.
 The flagship hotel is 349 ft tall with 31 floors, and includes 67 exclusive luxury condominiums and penthouses on the top eight floors.
 It reopened in October 2008 after completing a $200-million reconstruction project and contains the Roast restaurant and 24 Grille.
Westin Hotels & Resorts is an American upscale hotel chain owned by Marriott International.
 As of 2017, Westin operated over 269 hotels in multiple countries across the globe.
Lincoln Square is a mixed-use urban development in Bellevue, Washington, owned by prominent local developer Kemper Freeman.
 Lincoln Square, located along Bellevue Way between NE 6th and NE 8th streets, consists of two skyscrapers with retail and restaurant space, and a movie theater; and a 148-room residential tower and 337-room luxury hotel (One Lincoln Tower); and underground parking.
 The development constitutes part of "The Bellevue Collection", which consists of Freeman's properties in downtown Bellevue alongside Bellevue Place and Bellevue Square.
 The office tower is leased to Eddie Bauer's corporate headquarters and Microsoft; the hotel is occupied by Westin Hotels & Resorts.
The Suncor Energy Centre, formerly the Petro-Canada Centre is a 1,945,000 square foot (181,000 m²) project composed of two granite and reflective glass-clad office towers of 32 floors and 53 floors, situated in the office core of downtown Calgary, Alberta.
 At 215 m (measured to top of the structure), the west tower is the 13th tallest building in Canada and the fourth tallest skyscraper outside of Toronto, having been surpassed on July 8, 2010 by the neighbouring Bow.
 The office towers encompass 1,702,000 square feet (158,000 m²) of rentable office space with the complex also containing 243,000 square feet (23,000 m²) of retail and underground parking area.
 A glass-enclosed walkway (part of the +15 System) provides shelter, and easy access to the surrounding buildings.
The Westin Harbour Castle Hotel is a large, modern hotel located on 1 Harbour Square, next to the waterfront of Toronto, Ontario, Canada.
 It is part of the Westin Hotels chain within the Starwood Hotels & Resorts Group, owned by Marriott International.
Al Habtoor City (Arabic: الحبتور سيتي‎ ‎ ) (former name ‘Habtoor Palace complex’) is a multi-use development in Dubai.
 Consisting of three hotels (The St. Regis Dubai, W Dubai – Al Habtoor City, and The Westin Dubai, Al Habtoor City) and three high-rise residential towers commissioned by the Al Habtoor Group in 2012.
 Part of the Hotel Collection, The St. Regis Dubai opened in December, 2015 and was the first hotel to open in the development.
 The W Dubai – Al Habtoor City made its debut in June 2016 and The Westin Dubai, Al Habtoor City welcomed its first guests in August 2016.
 Al Habtoor City stands on the site of one of Dubai’s oldest hotels, the Metropolitan on Sheikh Zayed Road.
The Galleria, stylized theGalleria or the Houston Galleria, is an upscale mixed-use urban development shopping mall centrally located in the Uptown District of Houston, Texas, United States.
 The development consists of a retail complex, as well as the Galleria Office Towers complex, two Westin hotels, and a private health club.
 The office towers and hotels are separately owned and managed from the shopping center.
Galleria Office Towers is an office complex located on the site of The Galleria in the Uptown district of Houston, Texas, United States.
 The buildings, consisting of the Galleria Tower I, Galleria Tower II, and the Galleria Financial Center, are managed by Colville Office Properties.
The Westin Las Vegas Hotel & Spa is a resort near the Las Vegas Strip in Paradise, Nevada.
 The Westin is managed by Pyramid Hotel Group, under franchise from Starwood Hotels & Resorts Worldwide, owner of Westin Hotels.
 It is noteworthy for being one of the first Las Vegas resorts to prohibit smoking in almost all parts of the property.
The Westin Georgetown, Washington, D.C. is a luxury Postmodernist-style hotel located at 2350 M Street NW in the West End neighborhood of Washington, D.C., in the United States.
 Completed in 1984, the hotel was originally known as The Regent, but changed its name in 1985 to The Grand.
 After the hotel's owners were declared bankrupt in October 1994, the corporate predecessors to Starwood Hotels and Resorts Worldwide purchased the property in November 1995.
 Westin Hotels partnered with the new owners and rebranded the property first as The Westin Hotel in January 1996, then as The Westin Grand in 1999, and finally as The Westin Georgetown in 2010.
 Since 2011, The Westin Georgetown has been AAA-rated four diamonds.

Question: How many Westin hotels are located in the site the Galleria Office Towers are located in?
Answer: two