Complex sentence: Each floor has three large windows overlooking the inner ward; the second floor has two additional grand windows on the sides of the gatehouse; the gatehouse was fitted with fireplaces and would originally have had prominent chimneys.
Split into simpler sentences: Each floor has three large windows overlooking the inner ward; the second floor has two additional grand windows on the sides of the gatehouse. The gatehouse was fitted with fireplaces and would originally have had prominent chimneys.