The church in Montmartre with the great view of Paris is Basilique du Sacre Coeur. Congrats if you got it right.
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The bugler stops playing part way through the tune. This is to commemorate a 13th century soldier who was in a tower of the basilica and was killed by an arrow. Even today, the bugler stops at the same point in the tune where the original soldier died.
Looking for more things to do in Krakow that aren't related to WW2?