San Francisco is also a world-class famous scenic tourist city, with the reputation of the United States "the most beautiful city". San Francisco is also a sister city of Shanghai. On January 28, 1980, San Francisco became a friendly city with Shanghai. The circular arch of City Hall Square resembles the Paris Royal Military Academy in appearance. It is said to be one of the five domes in the world, one of which is higher than the dome of the U.S. Capitol.