Simplify the following text for a Grade 4 native English-speaking person.
Original: Many of the former peasants gained wealth by selling their acres to the settlement companies of growing Berlin and built luxurious mansions on HauptstraÃ e. The large town hall Rathaus SchÃ neberg was completed in 1914 .
Simplified: Its town hall Rathaus SchÃ neberg was completed in 1914 .