Complex sentence: The keep is nearly square, the east and west sides are long and the north south sides about it stands more than tall (the turrets rise an additional above the parapets) and it commands the countryside around it from its elevated position atop the ringwork.
Split into simpler sentences: The keep is nearly square: the east and west sides are long and the north-south sides about. It stands more than tall; (the turrets rise an additional above the parapets) and it commands the countryside around it from its elevated position atop the ringwork.