Complex sentence: The earthern ramparts of the fort are today largely overgrown with a double belt of mature beech trees, planted in the 19th century and have been partly obscured by later buildings along the southern side, adjoining the village.
Split into simpler sentences: The earthern ramparts of the fort are today largely overgrown with a double belt of mature beech trees, planted in the 19th century. They have been partly obscured by later buildings erected along the southern side, adjoining the village.