The fourth phase of development at St German’s Cathedral is represented by the upper masonry of the north transept and of the tower and the whole of the south transept apart from certain modern repairs. The quoin stones of these parts of the cathedral are of red sandstone. The blocking of the eastern arch of the nave arcade is also of this date. This work was undertaken by Sir William le Scroop who received authority from the Pope in 1396 to build a castle which would defend the church. It was said that the cathedral was much damaged or ruined by the end of the 14th century.