The Treaty of Seville was signed on 9 November 1729 between Great Britain, France, and Spain, concluding the Anglo-Spanish War (1727).
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Preliminary discussions had already taken place between Britain and Spain at the Convention of Pardo and the Congress of Soissons. Most of the clauses signed at Seville had been agreed at those conferences.
William Stanhope and Sir Robert Walpole participated in the negotiations. Stanhope was rewarded for his services and became Baron Harrington in January 1730. Moreover, Walpole rewarded Stanhope by making him the Secretary of State for the Northern Department.
Based on the terms of the treaty, Britain maintained control of Port Mahon and Gibraltar. In return, Britain supported the claim of Elisabeth Farnese, Queen of Spain to the Duchy of Parma, after the death of Antonio Farnese, Duke of Parma. It opened the way for the 1731 Treaty of Vienna creating an alliance with Austria, which had been their real objective.
While in Seville, King Philip V of Spain and his wife Elisabeth Farnese had a child Maria Antonietta of Spain who was born a week after the signing of the treaty. The couple had come to the city to oversee the contract.