Complex sentence: Miguel de Azcuénaga's manor house in Olivos, designed by Prilidiano Pueyrredón, was inherited by Carlos Villate Olaguer, who donated it to the state on the condition that it become the official residence of the president.
Split into simpler sentences: Miguel de Azcuénaga's manor house in Olivos was designed by Prilidiano Pueyrredón. It was inherited by Carlos Villate Olaguer, who donated to the government on the condition that it become the official residence of the president.