António de Serpa Pimentel (1825, Coimbra

Coimbra

Coimbra is a city in the municipality of Coimbra in Portugal. Although it served as the nation's capital during the High Middle Ages, it is better-known for its university, the University of Coimbra, which is one of the oldest in Europe and the oldest academic institution in the...

 – 1900) was Prime Minister of Portugal from January 14 to October 11, 1890. His term in office began as a reaction to the British ultimatum

British Ultimatum

The 1890 British Ultimatum was an ultimatum by the British government delivered on 11 January 1890 to Portugal in breach of the Treaty of Windsor of 1386...

concerning Portuguese colonial policy in southeast Africa. The signing of the "Treaty of London" later that year, which was intended as a step to resolve the crisis, was viewed as further appeasement of a powerful Britain. This led to his resignation and the fall of his government.