Complex sentence: Westminster College was the site of Sir Winston Churchill's famous "Iron Curtain" speech in 1946 and is now the site of the Winston Churchill Memorial Museum, housed in the basement of a relocated London church designed and built by Christopher Wren.
Split into simpler sentences: Westminster College was the site of Sir Winston Churchill's famous "Iron Curtain" speech in 1946. The college is now the site of the Winston Churchill Memorial Museum, housed in the basement of a relocated London church designed and built by Christopher Wren.