Silvassa Pronunciations ; is the capital of the Indian Union Territory of Dadra and Nagar Haveli.During Portuguese rule, Silvassa was also known as Vila de Paço d'Arcos, after the town of the same name near Lisbon (Paço de Arcos, Oeiras).The city has a large number of factories and industries providing significant government revenue, which allows the city to maintain a low level of taxation.