This crown is around the pinnacle of the taller tower of St. Mary's Basilica in Krakow. According to this article, it was placed there in 1666. It wasn't until I enlarged this photo that I noticed the steeplejack's ladder.
Immediately below the crown is the window where the trumpeter gives the hourly call. My attempt at a photo of the trumpeter was a pathetic fuzzy effort, so enjoy this video instead.