The original Kolosi (Kalasha) or vase-like structure at the top of the Sivadol in Sivasagar or Sibsagar was made of pure gold. It was too meaningless a use of the valuable gold for the British. So, they eventually brought that down.
Hayagriva Madhab Temple in Hajo is named after Hayagriva, the horse headed avatar of Lord Vishnu. As is the case with most Archaeological sites in Assam, this place survives more as a living religious site.