Simplify the following text for a Grade 10 native English-speaking person.
Original: Sir Christopher Wren ( 20 October 1632 â `` 25 February 1723 ) was a 17th century English designer , astronomer and geometer .
Simplified: Sir Christopher Wren ( 20 October 1632 -- 25 February 1723 ) is one of the most highly acclaimed English architects in history .