Beyond serving the simple purpose of providing companies with office space, some office buildings also become world-famous cultural icons due to their unique design or remarkable history.

In order to find out which are the most popular office buildings, CommercialCafe looked at the number of web visits to the Wikipedia pages of famous U.S. office buildings larger than 1 million square feet. The study is based on views since 2015, the earliest point where there is available data.

These are the nation’s 10 most popular office buildings by Wikipedia page views: