Original sentence: It was begun in the Spring of 1558 by Pope Paul IV in the Vatican Gardens.Paul IV commissioned the initial project of the 'Casina del Boschetto', as it was originally called, to architect Pirro Ligorio and the first mention of the building can be found on 30 April 1558 and in a notice of the following 6 May, saying that the Pope spent "two thirds of his time at the Belvedere, where he has begun to build a fountain in the woods"
Edited sentence: It was begun in the spring of 1558 by Pope Paul IV in the Vatican Gardens.Paul IV commissioned the initial project of the 'Casina del Boschetto', as it was originally called, from architect Pirro Ligorio, and the first mention of the building can be found on 30 April 1558 and in a notice of the following 6 May, saying that the Pope spent "two thirds of his time at the Belvedere, where he has begun to build a fountain in the woods"