with little success. In the second half of the century, Charles III made another attempt to revive the region's commerce; it took the form of the Royal Segovian Wool Manufacturing Company (1763). However, the lack of competitiveness of production caused the crown withdraw its sponsorship in 1779. In 1764, the Royal School of Artillery, the first military academy in Spain, was opened. This academy remains present in the city today. In 1808, Segovia was sacked by French troops during the War of Independence. During the First Carlist War, troops under the command of Don Carlos, Count of Molina unsuccessfully attacked the city. During the nineteenth and first half of the twentieth century, Segovia experienced a demographic recovery that was the result of relative economic stability. Demographics The population growth experienced during the nineteenth century accelerated steadily beginning around 1920: 16,013 inhabitants that year, 33,360 in 1960, 53,237 in 1981. Since the 1980s growth has slowed markedly: 55,586 in 2004 and 56,047 in 2007. As of 1 January 2019, there were 11% inhabitants foreigners – 4.478% coming from any other country of Europe, 2.37% being Africans, 3.7% being Americans, and 0.435% being Asians. Heritage World Heritage City In 1985 the old city of Segovia and its Aqueduct were declared World Heritage Sites by UNESCO. The old city contains a multitude of historic buildings both civil and religious, including a large number of buildings of Jewish origin, notably within the old Jewish Quarter. One of the most historically important Jewish sites is the Jewish cemetery, . Among the most important monuments in the city are: The Aqueduct of Segovia, located in Plaza del Azoguejo, is the defining historical feature of the city, dating from the late 1st or early 2nd century AD. Like a number of other aqueducts in Spain, Segovia's Roman-built aqueduct receives attention for being one of the “extraordinary engineering accomplishments” existing in the country, wrote Alejandro Lapunzina in Reference Guides to National Architecture: Architecture of Spain. It is still used to deliver drinking water. “The aqueduct of Segovia is – because of its long span, architectural beauty, uncharacteristic slenderness, and dramatic presence in the center of a dense urban fabric – the most impressive Roman structure in Spain, and one of the most famous among the numerous aqueducts built by the Romans throughout their vast Empire,” Lapunzina wrote. It consists of about 25,000 granite blocks held together without any