I’ve updated the plots on the map of Trombone Art in European Churches, Pre-1800. There are now 94 examples. It is shown below, for your convenience.

One of the most striking things about the first map is the large cluster of sacred trombone art in Italy. Included below the European map is a detail of Italy. You can see more clearly that, aside from the cluster in Rome, most of the examples fall in northern Italy, with a few reaching into “Italian” towns in southern Switzerland. The primary Italian regions are Lombardy, Veneto, and Emilia-Romagna. The city whose name you can’t read because it’s covered by pins is Milan; there is a big cluster there, extending north.

Again, to see the actual artwork, visit the Trombone History Timeline. All the examples on the map can be found there!