Hello how may I help you? i want some facts on cities How about I tell you about Denver? what is the tallest building there? The tallest building in Denver is the Republis Plaza. Would you like to hear more about it? yes Republic Plaza was built in 1984, and contains 56 floors, the majority of which are used as office space. Republic Plaza currently stands as the 137th-tallest building in the United States. how many people can it hold? I am not sure about that but Republic Plaza includes 1,200,000 square feet (110,000 m2) of office space, and three retail levels containing shops, restaurants, and service businesses. The building has a 3-story marble lobby that features a quarterly "Art in Public Places" program of Colorado and regional artists. ok tell me more The Republic Plaza is the home to the American Lung Association in Colorado's Anthem Fight for Air Climb. The event is held the last Sunday in February and is a 56-story stair climb to the top of the building. thanks