Donning historical costumes, medieval polearms and lanterns, night watchmen and tower keepers from across Europe marched through the western German town of Viersen on Saturday as part of their annual gathering. Organized by the “Night Watchmen and Tower Keepers’ Guild,” the parade marked the highlight of the meeting that has drawn members from Germany, Poland, Denmark and the Netherlands, among others, and is set to last until Sunday. Until modern times, it was the night watchman’s job to report fires or robberies, settle disputes and protect sleeping people from evildoers. Today, night watchm…