The town center , Piazza Mino da Fiesole , with its austere cathedral founded in 1028 , is the starting-point for some exhilarating hill walks ( the tourist office in the main piazza has walking maps ) , the most immediate being the steep paved lane leading from the square up to the small San Francesco convent and post-card views of Florence .
The cathedral of Piazza Mino da Fiesole did not exist before 1900 .