Calle 1 - De Madrid [work]

This is the symbolic center of Spain. It is the location of the Real Casa de Correos

, defines the city's urban DNA and reflects its history as the administrative and emotional heart of Spain. The Origin: Kilometre Zero and the Radial System calle 1 de madrid

: A specific minor street or a numbered street in a residential colony like ? This is the symbolic center of Spain

While "number 1" itself is a specific address, the street's location places it within steps of major landmarks that define the identity of Madrid: Plaza de la Villa: calle 1 de madrid

It sounds like you are referencing a specific address or a colloquial name: (which translates to "1st Street of Madrid").