What is "lipovans"

Lipovans or Lippovans (, , , ) are Old Believers, mostly of Russian ethnic origin, who settled in the Moldavian Principality, and in the regions of Dobruja and Eastern Muntenia. According to the Romanian census of 2002, there are a total of 35,791 Lipovans in Romania, of whom 21,623 live in Dobruja.