Complex sentence: The round tower is made of muschelkalk rubble stone with plaster mortar and has a diameter of about 4.4 m and wall thickness of 1.2 m and is about 10 m high.
Split into simpler sentences: The round tower is made of muschelkalk rubble stone with plaster mortar. It has a diameter of about 4.4 m, a wall thickness of 1.2 m and stands about 10 m high.