Complex sentence: Marco Sciarra was the follower and imitator of Benedetto Mangone, of whom it is recorded that having stopped a party of travellers which included Torquato Tasso, he allowed them to pass unharmed out of his reverence for poets and poetry.
Split into simpler sentences: Marco Sciarra was the follower and imitator of Benedetto Mangone, who was documented to have stopped a party of travellers which included Torquato Tasso. Sciarrae allowed them to pass unharmed out of his reverence for poets and poetry.