Most of the churches in Paris have organs, but a few also have extraordinary organists. Jean Guillou, the organist of the Eglise St-Eustache (Les Halles, 1st), is considered one of the greatest organists of all time. He’s internationally recognized as a master organist, pianist, composer and improviser for over half a century. And you can hear him play – for free – at St-Eustach’s Sunday recitals. The organ itself is new (1989), housed within the 19th-century carved-wood casing designed by Baltard. It’s unique in that it was designed with the console at ground level beneath the nave so that the audience can see the organist playing up close. The next recital dates with Jean Guillou are Jan 20th and 27th, 5:30pm-6pm (followed by mass with organ accompaniment; stay seated for the entire mass or leave before it starts, and please: no photos). Click here for a video of the master at work.