If you book the hop-on hop-off bus tour in Milan, when you stop at the church with the Last Supper do you get to see it without buying an additional ticket?
As far as I know, the ho-hos are drive-bys, you don't get entry to anything but the bus. Check the website to be sure.
Nope. You can enter the church if it is open, but you have to have a ticket and get dehumidified to enter into the room with the Last Supper. First trip to Milan we had to buy a half-day bus tour to get to see it.
It looks like you do only if you purchase the Last Supper hoho tour package that includes the entry ticket.
http://www.milano.city-sightseeing.it/eng/il-cenacolo-2016.html
Otherwise, no, you'd have to make a separate reservation and ticket purchase. These can be very difficult to get!
I strongly recommend visiting the Viator website to purchase their half day Milan tour...Be sure to choose the tour that includes The Last Supper. This will ensure your admission to see this amazing work of art. We enjoyed this bus tour in lieu of a hop-on hop off tour, because it covered Milan's most important places in an efficient manner, with information provided by a local guide. There will be stops along the way. Our itinerary included an interesting visit to La Scala, The Galleria, the cathedral & an excellent commentary by our tour guide at The Last Supper. We found the tour to be very well priced and a wonderful overview of Milan. Because it includes The Last Supper, the tour fills up quickly, so you will want to purchase your ticket as soon as possible. Tickets to The Last Supper are limited, as visits are timed and only a small number of people are allowed in the room at a time. Enjoy your time in Milan...I think you will find it an interesting change as pace as compared to most other Italian cities.