The Royal enclosure is the largest extant enclosure. Occupying an area of 59,000 square metres and protected by lofty double walls, it housed as many as 45 buildings including the Mahanavami Dibba , King’s audience hall and the public bath.
The public bath , located at the south-eastern corner is the largest tank in enclosure and was used by women. Just north of the stepped bath , a unique stepped tank has been unearthed. Made of well-dressed schist blocks, square on plan, this tank has five landings , each connected by ornamental steps.
The Royal enclosure was definetly not built by a single ruler or dynasty and evidence suggests three phases of structural activity. Since many additions and alterations were made in existing structures , it is impossible to exactly date the three phases.