Loosduinen (Dutch pronunciation: [loːzˈdœynə(n)]) is a former village in the Netherlands that was a municipality unto itself until 1923, when it was annexed by The Hague and subsequently became a district of the city.

During this time Count Floris III of Holland also founded a chapel (today known as Abbey Church) in Loosduinen, which was part of his property.

In these annals it is written that in 1186 Count Dirk VII of Holland married Aleida van Kleef in the chapel of the villa Losdun.

[9] Records also indicate that around 1228, Count Floris IV of Holland and his wife Machteld van Brabant founded a Cistercian abbey for nuns in Loosduinen.

His successor, Count Floris V, separated two area's known as Haagambacht and Monsterambacht from each other in the year 1280 and as a result split a village in two parts.

[8] There is a legend going around that in the 14th and 15th centuries the Abbey Church acquired international fame as a place of pilgrimage for women who remained childless.

[10] The reason why barren women made a pilgrimage to the abbey is because countess Margaretha van Hennebergh and all her children were buried there.

The Abbey Church stayed a popular pilgrimage destination for barren women well into the eighteenth century.

The monastery was destroyed at the beginning of the Eighty Years' War (1568-1648), while only a large part of the church remains.

[12] In addition the districts Eikenduinen, Poeldijk and Kwintsheul became part of the Loosduinen municipality, with F. van der Goes as the first mayor.

[13] In the meantime Loosduinen remained, as it always has been, a rural municipality of farmers and market gardeners that focused mainly on cultivating fruits and vegetables.

[14] Loosduinen has had public transport for a long time with a tram connection being established with The Hague in 1882.

During 1888 to 1928 there was even a tram connection with Kijkduin which only operated in the summer, since it was a popular beach destination for the people living in the nearby area.