Alverca do Ribatejo
Alverca do Ribatejo () 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. It covers an area of and 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.