The limits on cash use in Italy under the new laws have come up so I thought this note from my Italian hotel was interesting:

All cash transactions in the Italian territory may be provided within a maximum threshold equal to €999.99. Regarding foreign tourists (who are not Italian citizens or are not citizens of one of the EU countries and of the European Economic Area) the limit may be increased up to €14,999.99.

So nonEU/EEA citizens can pay hotels in cash up to (almost) 15K!