https://asimusei.it/ The grand list of all ASI (AutoMotoClub Storico Italiano) recognized museums and collections in Italy.
https://www.officinebenelli.it/officine/2021/il-museo/ The official Benelli + Motobi museum. Located in the Benelli ancestral home of Pesaro.
http://www.piccolomuseodellamoto.it/menu.html Emilio Bariaschi’s museum in Guastalla (Reggio Emilia). Many marques, many fine examples.
http://www.mototalbott.com/ Robb has spent years amassing a collection rare gems, many of them of the Italian ilk. The museum is nestled in the lovely backdrop of Carmel Valley, CA and best if accessed on two wheels.