diogo pinto de freitas do amaral (; 21 july 1941 – 3 october 2019), known as freitas do amaral, was a portuguese politician, writer and law professor. he was minister of foreign affairs from 12 march 2005 to 3 july 2006. he also was the prime minister in an acting role from 4 december 1980 through 9 january 1981. he was born in póvoa de varzim, portugal.