When proceeding further through the ambarawa one could reach the ‘Hewisi Mandapaya’ or the drummer’s platform or dais. When the great offering to the sacred tooth relic or the ‘Thevava’ was done, one could the way of Hewisi Poojawa or the offering of Hewisi or the drums using the five kinds of musical instruments of the up country tradition. It had been conducted daily. The upper roof had been supported by 20 stone columns 10 each side.
These massive stone columns were carved, created and reconstructed during the service of Diyawadana Nilame K.B Nugawela. Pillar caps(pekada) at the top of the stone columns were attractive. One could see three large brass lamps or Dolos Maha Pahan which were lighted through the 12 months of the year.
From right side of the Hewisi Mandapaya one could enter the ‘Image House’ in the lower storey, and paththirippuwa (octagon) from where the king could watch the various festivals held. From the left side near the chaitya these steps could be used to enter the old ‘Diggeya’ the long hall used daily by drummer’s for the ‘great offering’ of thevava.
When you Entered to the Hewisi Mandapayay you can hear the "Thevava" one could the way of Hewisi Poojawa or the offering of Hewisi or the drums using the five kinds of musical instruments of the up country tradition. It had been conducted daily