Simplify the following text for a Grade 9 native English-speaking person.
Original: This perfectly symmetrical monument took 22 years ( 1630 â `` 1652 ) of labor and 20,000 workers , masons and jewellers to build and is set amidst landscaped gardens .
Simplified: This perfectly symmetrical monument took 22 years ( 1630-1652 ) of hard labor and 20,000 workers , masons and jewellers to build . Along with the building there is landscaped gardens .