Ostrogothic king Vitiges cut off the aqueducts. According to the medieval guidebook Mirabilia Urbis Romae, the baths were then known as "Palatium Diocletiani". In the 1560s, Pope Pius IV ordered the building of a basilica in some of the remains, to commemorate Christian martyrs who according to legend died during the baths' construction, Santa Maria degli Angeli e dei Martiri. To this was attached a Carthusian charterhouse. Michelangelo was commissioned to design the church and he made use of both the frigidarium and tepidarium structures. He also planned the main cloister of the charterhouse. A small cloister next to the presbytery of the church was built, occupying part of the area where the baths' natatio had been located. After 1575, starting under Pope Gregory XIII, several remaining halls of the baths were converted into grain and oil stores for the city of Rome. After Rome became part of the Kingdom of Italy, its seat of government was moved to the city. In 1884, the Carthusians abandoned the charterhouse and the area around the baths was subject to substantial changes. Roma Termini station was built, the Ministry of the Economy moved to the area, and the Grand Hotel and Palazzo Massimo were constructed. Gaetano Koch designed the palazzi fronting Piazza dell'Esedra (now Piazza della Repubblica), destroying part of the original exedra. Via Cernaia cut off the western gymnasium from the remains of the enclosure wall (the latter are now in Via Parigi). In 1889, the Italian government set up the Museo Nazionale Romano in the baths and in the charterhouse. Moses Jacob Ezekiel studio Moses Jacob Ezekiel (October 28, 1844 – March 27, 1917) was an American sculptor who established an artist's studio in the Baths of Diocletian — where he lived and worked from 1879 to 1910, selling his works internationally including as commissions in the United States. Ezekiel's studio was regarded as "one of the Show Places of the Eternal City, magnificent in proportions and stored with fine art works." He held an open house there every Friday afternoon, in addition to hosting musicales, where could be heard "the finest music by the greatest talent". Visitors to his studio included: Gabriele d'Annunzio Queen of Italy Margherita of Savoy General and future President Ulysses Grant Franz Liszt Emperor Wilhelm II of Germany After 30 years, the government "demand[ed] the possession of this part of the ruins as an adjunct to