Alverca do Ribatejo

Alverca do Ribatejo (Portuguese pronunciation: [aɫˈvɛɾkɐ ðu ʁiβɐˈtɛʒu]) is a city (cidade) and a former civil parish in the municipality of Vila Franca de Xira, Portugal. In 2013, the parish merged into the new parish Alverca do Ribatejo e Sobralinho.[1]

Alverca do Ribatejo
Civil parish
The military airbase in Alverca
Coat of arms
Alverca do Ribatejo Location in Portugal
Coordinates: 38°53′24″N 09°02′24″W
Country	Portugal
Region	Lisboa
Metropolitan area	Lisbon
District	Lisbon
Municipality	Vila Franca de Xira
Disbanded	2013
Area
• Total	17.89 km2 (6.91 sq mi)
Population  (2011)
• Total	31,070
• Density	1,700/km2 (4,500/sq mi)
Time zone	UTC±00:00 (WET)
• Summer (DST)	UTC+01:00 (WEST)

It covers an area of 17.89 square kilometres (6.91 sq mi) and as of 2011 had a population of 31,070, making it the largest city in the municipality of Vila Franca de Xira. It was promoted to city status in 1990. It is a city and a suburb near the Tagus River (rio Tejo), in the Lisbon metropolitan area.

Alverca has been deeply connected with aviation since the early 20th century. A military air base was built there in 1918. The aerospace company OGMA, the Portuguese Air Force General Storage, the Air Force Aerodrome Engineering Unit and a branch of the Air Museum are presently based there. The Alverca aviation facilities also housed the first international airport of Portugal, closed after the inauguration of Lisbon Airport in 1942.