My 7th gr grandmother was Maria Barbara Giaroli who married Cristoforo Collini from Pinzolo in Val Rendena. Maria Barbara was from a town in Val di Sole called Presson. Both were born in the early 1600's. These locations are somewhat south of Bolzano and obviously quite a differant period than the one you are searching.
I am mostly writing to say hello and wish luck. I've been searching the filmed church records from that early period to find Maria Barbara's baptism record. So far no luck, though I have found the Giaroli families who lived in Presson at the time. I have found that the Giaroli name is not very common, though. Who know, perhaps we are related!