Tempe City Hall is the office for the Tempe City Council and Tempe City Manager as well as several city departments.
Tempe City Hall is an historic building that also serves for the formal governance of the City of Tempe. Read about the inverted pyramid that is City Hall here: http://www.tempe.gov/city-hall/community-development/historic-preservation/tempe-historic-property-register/tempe-municipal-building
