  alcalÃ¡ de henares (), meaning citadel on the river henares, is a spanish city whose historical centre is one of unesco's world heritage sites. the city stands out for its rich archaeology and was one of the first bishoprics founded in spain. located in the autonomous community of madrid,  northeast of the city of madrid, at an altitude of  above sea level, it has a population of around 200,000. locally, the city is generally known simply as "alcalÃ¡", but "de henares" is appended when needed to differentiate it from a dozen spanish cities sharing the name alcalÃ¡ (from the arabic word al-qal'a Ø§ÙÙÙØ¹Ø© for fortification or c
1_BC_establishments AlcalA!_de_Henares Jewish_Spanish_history Roman_sites_in_Spain Roman_towns_and_cities_in_Spain World_Heritage_Sites_in_Spain