Abando, formerly known as San Vicente de Abando, is one of the eight districts of Bilbao, Basque Country (Spain). It covers most of the city's centre, located on the left bank of the estuary of Bilbao. It is the only district of Bilbao with all of its land completely urbanised. Abando was originally an elizate and also a municipality until 1876, when part of it was annexed to Bilbao, the rest of the elizate's municipal land was integrated into Bilbao in 1890. In 2016 the population was 50,903. Abando is the wealthiest district in Bilbao, with personal and family incomes being well above the citywide average. History The exact moment of the foundation of Abando is unknown, as it is common with other elizates across Biscay. In the year 1300, the city of Bilbao was founded by Diego López V de Haro in the place of a small settlement at the right bank of the estuary. This settlement had its rights as a city confirmed by King Ferdinand V of Castile and its charter document included jurisdiction over the lands at the other side of the San Antón Bridge, an area then called Allende la Puente and today known as Bilbao la Vieja, which originally belonged to Abando. During the 18th century Abando grew to be the most populous elizate of Biscay, with around 2,100 inhabitants. This population was distributed across several rural neighbourhoods composed mostly of farm houses (Basque: baserri). These neighbourhoods were Bilbao la Vieja, Ibarra, Mena-Urizar-Larrasquitu, Elejaberri, Olaveaga, Zorroza and Ibaizabal. In 1835, during the First Carlist War, the siege weapons and artillery used for the siege of Bilbao were stored in the sacristy of the San Vicente church of Abando. The railroad arrived in 1863 with the opening of the rail line to Urduña. This railway was constructed to connect Bilbao and Biscay with Castile, and was eventually expanded to reach Castejón. This led to the establishment of the Bilbao-Tudela Railway Company, which constructed a terminus railway station in Abando, where the Irish Charles Blacker Vignoles worked as an engineer. The company was absorbed by the Compañía de los Caminos de Hierro del Norte (Northern Railways Company) in 1878 and the ownership of the railway station passed to them. During the 19th century Bilbao had become congested and needed more land to grow in size, and in 1870 part of the land belonging to Abando was