Gorgeous! I absolutely adore Montreal’s Old Port, my love of it having started when I lived for a few years in Montreal. My business partner lived for a while in an apartment in an old building that actually butted up against the basilica. I have so many fond memories of strolling around the Old Port on sunny afternoons and then ending the day with dinner and a delicious red wine at his place.
I felt like I was back in Europe again, as you say.
And for those who love that sort of experience, Quebec City is as amazing or more.