Under the Doge Jacopo Tiepolo (1229-1249) and Ranieri Zen (1253-1268) the Franciscans worked hard to clean up the lake Badoer, a marshland in the San Stefano Confessor (San Stin), and there built the first church of Santa Maria Gloriosa and the adjoining monastery. But the first church was already small for the faithful who flocked to hear mass. So, from April 28, 1250 covering the whole field was enlarged to the channel it defines. Eighty years passed and the church also appears to be too small so that it was decided to reverse its architecture reducing the portion near the river and building there on the field of Frari. It was also dug a well for fresh water and turned around the apse bringing the main facade of the new church in the direction of the channel. Around the year 1330 began its work by Jacopo Celegato, completed by his son Pier Paolo in 1396. The new church, the Franciscans erected the third, had three naves, a transept and seven apses, but thanks to the generosity of John Corner in 1420 was erected the chapel of San Marco with the addition of the eighth apse. -