The first high-rise in Hong Kong was the Hong Kong & Shanghai Bank, completed in 1935. The building stood tall with 13 floors and was in use for five decades before being demolished for the construction of the HSBC Main Building. High-rise construction was limited in the early part of the 20th century. However, beginning in the 1970s, Hong Kong experienced a general trend of high-rise building construction that has continued to the present. This trend is in large part a result of the city's rugged, mountainous terrain and lack of flat land. The city entered a construction boom in 1980, which lasted roughly until 1993. Among the buildings built during these years are Hopewell Centre (1980), Bank of China Tower (1990), and Central Plaza (1992), three of the territory's tallest buildings upon their respective dates of completion.