Simplify the following text for a Grade 10 native English-speaking person.
Original: Inspired by Richmond Palace , he also included a recreation center with a bowling green , tennis courts , a pit for cock fighting ( now the site of the Cabinet Office , 70 Whitehall ) and a tiltyard for jousting .
Simplified: He also included a recreation center with a bowling green , tennis courts , a pit for cock fighting ( now the site of 70 Whitehall ) and a tiltyard for jousting .