Terrassa is a Spanish city in the east central region of Catalonia, in the province of Barcelona, comarca of Vallès Occidental, of which it is the cocapital along with Sabadell.
It is the site of Roman Egara, a former Visigothic bishopric, which became a Latin Catholic titular see.
The city is located in the Catalan Prelitoral depression, at the feet of the Prelitoral mountain range and the average altitude of the city is 277 meters above sea level. It is 20 and 18 kilometres from Barcelona and Montserrat respectively.
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