The architects chose this shape to get around informal height restrictions and to offer sunlight and good air circulation.

It is also a reference to the National Day of the Republic of China, which is October 10, also known as “Double Ten Day.”[3] Taipei city government was first established in 1920 during Japanese rule.

[5] When Taiwan was taken over by the Republic of China in 1945, Taipei's city hall was moved to the former campus of Jian Cheng Elementary School [zh].

As Taipei grew, its city hall could only accommodate around 1,000 employees, and many other units were scattered in various rented offices.

[2] The old city hall building became the Museum of Contemporary Art Taipei and the campus of Jian Cheng Junior High School [zh].