Simplify the following text for a Grade 5 native English-speaking person.
Original: Internationally , Ulm is primarily known for having the church with the tallest steeple in the world , the Gothic minster ( Ulm Minster , German : Ulmer MÃ 1\/4 nster ) and as the birthplace of Albert Einstein .
Simplified: The world 's highest church tower is the Ulmer MÃ 1\/4 nster ( 161,5 m ) in Ulm . Also , Ulm has the oldest city theater in Germany .