Complex sentence: He sited his entertainment in the abandoned cloisters kitchen of a Capuchin convent (which he decorated to resemble a subterranean chapel) near the Place Vendôme, he staged hauntings, using several lanterns, special sound effects and the eerie atmosphere of the tomb.
Split into simpler sentences: He sited his entertainment in the abandoned cloisters kitchen of a Capuchin convent (which he decorated to resemble a subterranean chapel) near the Place Vendôme. He staged hauntings, using several lanterns, special sound effects and the eerie atmosphere of the tomb.