The Organ has always been an instrument of unity and participation in a religious community: it harmonises and accompanies the voices of the congregation, alternates with or replaces these voices during the most important moments of religious ceremonies.

This is why, at the end of five centuries of musical history from the middle ages right up to modern times, every European country boasts noteworthy composers who have written extraordinary and fundamental pages of organ literature and why every religious community has entrusted master craftsmen with the construction of perfect instruments to place in the choir lofts of cathedrals, sanctuaries and small parishes.

There are also famous organ-makers in the «Marca Trevigiana»: Jacomello dagli Organi with workshop in S. Leonardo, Master Lorenzo dai Organi, friar Nicolò de Alemagna, Domenico di Lorenzo or di Lucca, Orazio Napolitano. Pietro Nacchini, who together with Callido, De Lorenzi, Moscatelli, Dacci Barbini, Merlini and many others, contributed in the creation of a «Veneto School», in 1750 constructed a splendid instrument in the church of S. Croce (which was called Santa Maria dei Battuti – inside the University block).
This is the oldest preserved in Treviso, in perfect working order thanks to restoration work sponsored by the Cassamarca Foundation, which has returned the precious collection of organs to the city and its province, where today they can be admired and listened to. Also for this reason world-famous players and performers come to Treviso from September to October each year, to participate in the International Organ Festival. Some cities, such as Brussels, Toulouse, Lisbon, Zaragoza, Innsbruck, Göteborg, Freiberg, Alkmaar, Umag, Fribourg and Trondheim, also seats of renowned organ festivals and the homes of exquisite historical instruments, have accepted Treviso’s proposal to form the European Committee of Cities with Historical Organs, acknowledging Marca Trevigiana as the European centre of interests for enthusiasts, scholars and researchers in this sector.
Treviso, together with the city of Pesaro has created the European Project Hydraulis which unites the Adriatic regions of Italy (Veneto, Friuli, Marche) with Slovenia, Croatia, Greek and Montenegro to enhance the historic organ heritage that, in particular on the coast, have been really influenced by the artistic and cultural supremacy of the Venetian Republic.