Florian Laskary z Kościelca was Bishop of Płock, Poland from 1317 until his death in 1333 AD,Florian Laskary of Kościelec at Diocese of Plock on GCatholic.orgPiotr Nitecki, Biskupi Kościoła w Polsce. w latach 965-1999. Słownik Biograficzny, Warszawa, Instytut Wydawniczy PAX, 2000, , p. 101. He was also Canon of Duke Bolesław II and a chaplain at Gniezno.
