Complex sentence: The "Stanza della Segnatura" ("Room of the Signatura") was the first to be decorated by Raphael's frescoes: it was the study housing the library of Julius II, in which the Signatura of grace tribunal was originally located.
Split into simpler sentences: The "Stanza della Segnatura" ("Room of the Signatura") was the first to be decorated by Raphael's frescoes. It was the study housing the library of Julius II, in which the Signatura of grace tribunal was originally located.