Mossovet an abbreviation of Moscow Soviet of People's Deputies, was the informal name of

• parallel, shadow city administration of Moscow
  Moscow
  Moscow is the capital, the most populous city, and the most populous federal subject of Russia. The city is a major political, economic, cultural, scientific, religious, financial, educational, and transportation centre of Russia and the continent...
  
  , Russia
  Russia
  Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
  
   run by left-wing parties in 1917
• city administration of Moscow
  Moscow City Hall
  The former Moscow City Hall is an ornate red-brick edifice situated immediately to the east of the State Historical Museum and notable in the history of architecture as a unique hybrid of the Russian Revival and Neo-Renaissance styles. During Soviet times it served as the V. I...
  
   in Soviet period (1918-1991). It was used in the same sense as City Hall is used in English vernacular.

Between 1918 and 1941, these two administrations were perceived as two distinct, although related, bodies. Mossovet (Imeni Mossoveta) title was appended to the names of different institutions as an honorary title ("in the name of Mossovet") referring to 1917 events, i.e.

• Mossovet Theater (established 1924, and still operates under this name)

or as a sign of administrative control ("established by Mossovet") by the current administration, i.e.

• Mossovet Architectural Workshops (established 1932)
• Mossovet Kindergarten could mean a corporate kindergarten for City Hall staff, or any public kindergarten managed by the City