Referenced In

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"according to a wild legend told at Ujjain, the great king Vikramajit was in the habit of cutting off his own head daily, as an offering to Devi..."

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"Ujjain is cited as one of the principalities in India."