Although some villages of Vila Nova da Barquinha are ancient, the development of the region is strongly related to the
Reconquista period, when the river
Tagus, which flows through the South of the municipality, was the border between the dominions of
Christians and
Moors. In the 12th century, the defence of this border was in charge of the
Knights Templar, who built several castles along the river. One of these is the
Castle of Almourol, built by the Master of the Portuguese Templars,
Gualdim Pais, in 1171. The picturesque castle is located on an island in the
Tagus river and can be visited by boat. Nowadays it is the most visited historical site in Vila Nova da Barquinha. . In the end of the 13th century, when the Reconquista was finished, the importance of the castles of the region declined. The villages along the Tagus then became important fluvial ports for the transport of agricultural goods of the region to
Lisbon. In the 16th century, the port of the village of Tancos became the most important of all, being granted a
foral (letter of feudal rights) in 1517 by
King Manuel I. From the early 16th century date the main church (
matriz) of the village of Atalaia, with a magnificent portal and interior in
Renaissance style. The village of Vila Nova da Barquinha, current seat of the municipality, was created in the 17th century around a fluvial port (hence the name
Barquinha =
Barca = Boat). In the 18th and 19th centuries the village became the most important in the region, and it was turned into the seat of the municipality in 1836. The importance of the river in the development of the municipality is reflected in its
coat-of-arms, which shows the picture of a boat. The arrival of the railway system in Portugal eventually led to the decadence of the fluvial commerce of the municipality. ==Climate==