Which king, who reassumed the throne upon his son's death, had in his service the Flemish-born military engineer George Prosper Verboom?
Marquis of Verboom George Prosper Verboom, also known as Jorge Próspero de Verboom (9 January 1665 in Brussels – 19 January 1744 in Barcelona, Spain), was a Flemish-born military engineer in the service of the King of Spain. On 9 January 1727, King Philip V of Spain granted him the title of Marquis of Verboom.
Sancho I of Portugal Sancho I (] ), nicknamed "the Populator" (Portuguese: ""o Povoador"" ), King of Portugal (Coimbra, 11 November 1154 – 26 March 1211 ) was the second but only surviving legitimate son and fifth child of Afonso I of Portugal by his wife, Maud of Savoy. Sancho succeeded his father and was crowned in Coimbra when he was 31 years old on 9 December 1185. He used the title King of Silves from 1189 until he lost the territory to Almohad control in 1191.