My family and I were in Krakow last summer over a weekend and we visited St. Mary's this way...we entered for a quick view from the main doors to see the inside of the church on a Saturday before exploring the rest of Krakow's historic center and visiting other churches. Then, on Sunday, we celebrated Sunday mass at St. Mary's at one of the early morning masses. My family and I sat in the front half of the church near the altar. You can even sit on the wooden side pews. Even though we did not understand the language, it was a beautiful mass made even more special since we had time to view the altar and panels, statues, Stations of the Cross, etc. from our pew, reflect and pray. After mass was over, we were able to approach closer to the altar to snap photos and view it before the next mass began. We actually had a small but decent amount of time to linger. Even as people filed in for the next mass, we quietly and reverently walked around the inside of the church to view things a bit closer. Of course, we did our quick "touring" respectfully, quietly and quickly. General visiting of the church on Sundays is after 2 pm but it's from the back of the church unless you have a ticket to go up closer. You can purchase the ticket outside at the ticket booth. We never bought a ticket. There's so many churches to see in Krakow and we were more than satisfied and happy to see St. Mary's by attending mass. If you do want more time to view and study the inside though, a ticket might be worthwhile. I don't know if this will give you a tour guide as well.
