La sentinelle du Palais Grand Ducal
Keeping watch on Grand Ducal Palace in Luxembourg City.
The building very wide, but on such a rather narrow street. It's hard to frame it well. Some of the architecture is medieval, and some is a more classical. According to Wikipedia it was first built in the 16th century and served as the city hall. Despite the age, I remember being impressed at how well maintained, and how clean it was.