Simplify the following text for a Grade 11 native English-speaking person.
Original: The focal point was the Djeser-Djeseru or `` the Sublime of Sublimes '' , a colonnaded structure of perfect harmony nearly one thousand years before the Parthenon was built .
Simplified: The focal point was the Djeser-Djeseru or `` the Sublime of Sublimes '' , a structure of perfect harmony nearly one thousand years before the Parthenon was built .