Complete the following sentence: The cathedral is known for its twelfth-century (ca. 1175), with two-winged bronze doors decorated with scenes of martyrdom of St. Adalbert of Prague and a silver relic coffin of that saint. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️
Swedish invasion.