The walls that surround the city today were imposed by the Serenissima, that, Having regard to the “supreme danger” course after the defeat of Agnadello, at the beginning of the sixteenth century had decided to transform the city of Treviso and Padua fortresses to defend the heart of the Republic. The villages grew up outside the city walls of the thirteenth century were included in the new ramparts in a polygonal, whose construction history can be divided into four distinct phases: 1509-13: disaster relief, with the activity of between’ Jucundus between 1510 and the 1511; 1513-15: overall final design by the captain Bartolomeo D'Alviano; 1516-19: implementation and completion of all the ring wall; 1520-60 about: completions and finishes; integration of the defense system with two new large bastions.
- Porta Santi Quaranta (visit the 4th Sunday of the month and during the Christmas period).
- Basilica of St. Nicholas (before and after the religious ceremonies).
- Bastion of San Marco (externally visible).
- Ponte di Pria (externally visible).
- Port Altinia (externally visible).
- Ramparts of St. Paul (externally visible).
- Porta San Tommaso (externally visible).
- Loggia dei Cavalieri (externally visible).
- Santa Maria Maggiore – Madonna Grande (before and after the religious ceremonies).
- Cathedral (before and after the religious ceremonies).
- Church of St. Francis (before and after the religious ceremonies).
- Casa dei Carraresi – espositiva headquarters (open during exhibitions).
- Palazzo dei Trecento (open during exhibitions).
- Refer to the website of the City.
The visit to the city, coming in front door Ss. Forty, begins with a drive to the right on the outer ring, that follows the moat around the fortified walls of Veneto, visible for good traits. You enter the city from the gate of Porta Calvi (near the medieval Basilica of S. Nicholas, a), parking the car in one of the streets of the area known as “garden city”. The walking tour starts from Porta Ss. Forty, to proceed in a clockwise direction along the walls: you can choose whether to take the stretch along the promenade above the embankment, or outside. Not far from the port is the well-preserved Bastion of S. Framework, place at the northwest corner of the fortress. If you are located outside the city walls, before the bastion at Porta Fra’ Jocund, allows a ladder to climb on the walls and found to continue up to the Bridge of Pria, built in 1521 by the mayor Paolo Nani to allow passage under the walls of Botteniga, divided downstream of the locks in 3 branches (Great Cagnan, Small Cagnan, Canal). The chi, where the Venetian walls coincided with the walls of the '200, you enter the medieval city announced by the bulk of the Church of S. Francis. Through Bell Street you will reach the productive heart of the medieval Treviso, where many streams of water moved up to 50 mill wheels for machining. To meet the few wheels that still rotate on roste, you follow the narrow streets between the Fish, Buranelli the porches and in the frieze Cagnani, until you reach the square of the pawnshop connected to the Piazza dei Signori from a porch. Here stands the crenellated Palazzo dei Trecento, home of the free Commune. From the square, along the central axis of the city's Roman and medieval, the “Calmaggiore”, that on the one hand leads to the Cathedral, with the Baptistery and the total canonical) and on the other, before the Loggia dei Cavalieri, and then to the small height of the square S. Andrea, where in view of the Sile stood the ancient Castelvecchio. Reached the river by S. Daisy, you can take either the opposite coast S. Daisy (on the side of “new town” over the Sile), until the closed S. Martin and reach inside door Altinia, Garibaldi is follow the coast to the complex of S. Leonardo, until you reach the Ponte Dante (“where the Sile and Cagnan”). The bend of the river Sile, which housed the port is still caught between the Bastion of S. Polo and now the gap road on the site of the Door, Mobile barrier for the passage of vessels. From here you can visit the medieval quarters east of Cagnano: will indicate the Sanctuary of the “Madona Great” or S. Maria Maggiore and the Church of S. Catherine. From the nearby Piazza del Grano, where once stood the medieval gate of S. Thomas (one of 11 open walls), you can see the new Renaissance Gate S. Thomas domed pavilion in lead.