Complex sentence: Guarded by a moat and drawbridge, fortified walls with bastions and a set of iron cannons (some of whom have been preserved to this day), the castle takes the form of an open square nearly 100 meters on a side, with three floors.
Split into simpler sentences: Guarded by a moat and drawbridge, fortified walls with bastions and a set of iron cannons (some of which have been preserved to this day). The castle takes the form of an open square nearly 100 meters on a side, with three floors.