Columbus Tower, also known as the Sentinel Building, is a mixed-use building in San Francisco, California, completed in 1907. The distinctive copper-green Flatiron style structure is bounded by Columbus Avenue, Kearny Street and Jackson Street, straddling the North Beach, Chinatown, and Financial districts of the city. Much of the building is occupied by film studio American Zoetrope, and the ground floor houses a cafe named after the company. The Sentinel Building is San Francisco Designated Landmark No. 33.
The Transamerica Pyramid at 600 Montgomery Street between Clay and Washington Streets in the Financial District of San Francisco, California, United States, is a 48-story futurist building and the second-tallest skyscraper in the San Francisco skyline. It was the tallest building in San Francisco from its inception in 1972 until 2018, when its height was surpassed by the newly constructed Salesforce Tower. The building no longer houses the headquartersof the Transamerica Corporation, which moved its U.S. headquarters to Baltimore, Maryland, but it is still associated with the company and is depicted in the company’s logo. Designed by architect William Pereira and built by Hathaway Dinwiddie Construction Company, at 853 feet (260 m), on completion in 1972 it was the eighth-tallest building in the world.