His reports to the Vatican are an important source for demography study of his diocese.
[2] Elsie links the name to Mazreku, an Albanian tribe north of Shkodër.
[3] Before 1743, Jovan Nikolović (or Gjon Nikolle) sent Mazarek to Italy to be trained for his religious tasks.
In 1792 he reported that villages around Gjakova received influx of Catholics from Albania.
[9] His prayers included "Ab albanensibus libera nos Domine" (English: Lord, save us from Albanians).