Calle Undécima
It takes an ordinal number for its name, the eleventh in a group of streets in the Hispanoamérica quarter that were left labelled by consecutive figures.
Around it survive Fourth or Tenth, in the Hispanoamérica quarter, district of Chamartín. The street barely reaches ninety metres: it starts at Fourth and ends against Calle de Ángel de Diego Roldán.
Numbering streets before giving them a proper name was a common device when new land was developed in the old district of Chamartín de la Rosa. In this group the number stayed fixed on the map, and the result is one of the few street patterns in Madrid where a street can be called by its place in the count, with no saint, battle, or worthy behind it.