 As an architect, he worked on the churches of Sant'Alessio on the Aventine Hill (1743) and Santa Dorotea in Trastevere (1751–1756).The Nolli map reflects Bufalini's map of 1551, with which Nolli readily invited comparison, however Nolli made a number of important innovations.Firstly, Nolli reorients the city from east (which was conventional at the time) to magnetic north, reflecting Nolli's reliance on the compass to get a bearing on the city's topography.