http://www.strw.leidenuniv.nl/
Sterrewacht Leiden is actually composed of two overlapping entities, an opleiding or school, which is the regular university structure responsible for both the undergraduate bachelor and master (BaMa) phases of education, and an onderzoekinstituut or research institute. There is complete overlap between the staff of both entities. Both are part of the Faculteit Wiskunde en Natuurwetenschappen or FWN, i.e the Department of Mathematics and Natural Sciences, which in turn is one of the pillars of Universiteit Leiden - UL, formerly known as Rijksuniversiteit Leiden (RUL)).