Complex sentence: The Mansion was a wedding gift from Mr. Felix Alzaga Unzué to his wife Elena Peña in 1920, and remains one of the most architecturally significant mansions in the Recoleta area.
Split into simpler sentences: The Mansion was a wedding gift from Mr. Felix Alzaga Unzué to his wife Elena Peña en 1920. It is one of the most architecturally significant exsting mansions in the Recoleta area.