Further, Henry died in 1392 or 1393 in Łuck, resulting in controversial claims — never verified or disproven — that he was assassinated by the Teutonic Knights (in revenge for luring away their ally, Vytautas), by his brothers (who decided not to share his father's inheritance with him once he abandoned the priesthood), or finally by his own wife, Ryngałła as accused by his brothers. Henry was buried in the Cathedral of Płock.
Henry's death in 1392 or 1393 in Łuck sparked controversial claims — never confirmed or refuted — that he was killed by the Teutonic Knights (in retaliation for luring away their ally, Vytautas), his brothers (who refused to share his father's inheritance with him after he left the priesthood), or his wife, Ryngałła, as alleged by his brothers. Henry was buried in the Cathedral of Płock.