Question: What structure are both the Four Seasons Hotel Chicago and 900 North Michigan in?

Context articles: Four Seasons Hotel Miami
Four Seasons Hotel New York Downtown
The Peninsula Chicago
Four Seasons Hotel Vancouver
Four Seasons Hotel and Residences Toronto
Four Seasons Hotel Houston
Four Seasons Hotel Chicago
Four Seasons Resort Carmelo, Uruguay
900 North Michigan
Four Seasons Hotel Hong Kong

The Four Seasons Hotel and Tower, also known as the Four Seasons Hotel Miami or simply the Four Seasons Tower, is a skyscraper in Miami, Florida, United States.
 It is located in Downtown Miami's Brickell Financial District.
 The tower contains a Toronto-based Four Seasons Hotel property, office space and several residential condominium units on the upper floors.
 Rising 789 ft with 70 floors, it is the second tallest building in Miami as well as in Florida.
The Four Seasons Hotel New York Downtown, also known as 30 Park Place, is a hotel and residential skyscraper in Tribeca, Manhattan, New York City.
 At 937 feet, the property is the tallest residential building Downtown, offering residents panoramic views of the Midtown skyline and New York Harbor.
 The top floors of the 82-story building, known as the Four Season Private Residences New York Downtown, have 157 residences, ranging from one to six bedrooms, all reached through a dedicated residential lobby at 30 Park Place.
 Below is a 185-room Four Seasons Hotel, with its own lobby on Barclay Street, which opened in 2016.
The Peninsula Chicago is a 20-story luxury hotel located at the intersection of East Superior Street and North Michigan Avenue in Chicago, Illinois.
 The hotel is part of The Peninsula Hotels group based in Hong Kong.
 In late 2009 the hotel was purchased by Hongkong and Shanghai Hotels who previously owned 92.5% of the hotel before the takeover.
 In 2004 the hotel won three major awards: "Travel + Leisure" Magazine's award for #1 Hotel in North America, the Zagat award for #1 Hotel in North America, and "Forbes" magazine awarded it with the Best Hotel Bar in the World.
 The Peninsula is one of only four 5-star hotels in Chicago, the others being the Four Seasons Hotel Chicago,the Ritz-Carlton Chicago at Water Tower Place, and Trump Tower Chicago.
 As of March 2017 rates at The Peninsula range from $374 to $8,500 per night.
The Four Seasons Hotel Vancouver is a luxury Five Star hotel in Vancouver, British Columbia, Canada.
 It is Cited as one of Vancouver's top hotels and located in the city's downtown core, connected to the Pacific Centre shopping mall.
 The hotel is one of only two hotels in Vancouver awarded Forbes Travel Guide Five Star rating, 2017 marks the hotels fourth consecutive year of winning this accolade.
 The Four Seasons Hotel Vancouver is the only property that is still owned and managed by Four Seasons Hotels and Resorts anywhere in the world.
The Four Seasons Hotel and Residences Toronto is a complex consisting of a 204-metre, 55-story residential condominium tower and a 125-meter, 30-storey hotel tower located in the Yorkville district in Toronto, Ontario, Canada, which opened on October 5, 2012.
 Located at 60 Yorkville Avenue, at its intersection with Bay Street, the complex is one block east of the previous Four Seasons Hotel Toronto at 21 Avenue Road.
Four Seasons Hotel Houston is a part of the Toronto-based Four Seasons chain of luxury hotels and resorts.
 Four Seasons Hotel Houston also has an Italian restaurant, "Quattro" with Chef Maurizio Ferrarese.
 Four Seasons Hotel Houston is located in Downtown Houston.
 The hotel includes Four Seasons Place, a group of 64 apartment units (42 one bedroom units, 21 two bedroom units, and 1 three bedroom unit).
 It is a part of the Houston Center complex.
Four Seasons Hotel Chicago is a part of the Toronto-based Four Seasons Hotels and Resorts chain of luxury hotels.
 It is located in the 900 North Michigan skyscraper on the north end of the Magnificent Mile overlooking Lake Michigan.
 The hotel occupies the 30th through 46th floors of the skyscraper, which contains a Bloomingdale's shopping center as well as ground-floor mono-brand locations for Gucci, MaxMara, Montblanc, L'Occitane en Provence, Kate Spade New York and Michael Kors.
Four Seasons Hotel Carmelo, Uruguay is a part of the Toronto-based Four Seasons chain of luxury hotels and resorts.
 Four Seasons Hotel Carmelo, the first Four Seasons Resort in South America, also offers Uruguay's premier golf course and resort according to Golf Digest.
 It is located within an hour of Colonia, a UNESCO World Heritage Site.
900 North Michigan in Chicago is a skyscraper completed in 1989.
 At 871 feet (265 m) tall, it is currently the eighth tallest building in Chicago and the 31st tallest in the United States.
 It was developed by Urban Retail Properties in 1988 as an upscale sister to Water Tower Place, one block southeast, and was the second vertical mall built along the Magnificent Mile.
Four Seasons Hotel Hong Kong () is a five-star hotel building in the Sun Hung Kai Properties-owned International Finance Centre complex in Central, Hong Kong.
 It was completed and opened in September 2005.
 It is a 45-storey building with 399 rooms, of which 54 are suites and 519 residential units, as part of the Four Seasons Place ().
 It is operated by Canadian-based hotel chain, Four Seasons Hotels and Resorts.