1 Leiden -> 11 subcats, 14 articles
2 Buildings and structures in Leiden -> 1 subcat, 18 articles
3 Museums in Leiden -> 9 articles
2 Burials in Leiden -> 1 subcat, 1 article
3 Burials at Pieterskerk, Leiden -> 22 articles
2 Culture in Leiden -> 7 articles
2 Economy of Leiden -> 1 subcat, 2 articles
3 Companies based in Leiden -> 1 article
2 History of Leiden -> 1 subcat, 5 articles
3 Members of the Leiden Guild of Saint Luke -> 33 articles
2 Leiden University -> 3 subcats, 24 articles
3 Leiden University alumni -> 76 articles
3 Leiden University faculty -> 1 subcat, 275 articles
4 Professorships at Leiden University -> 1 article
3 Manuscripts of Leiden University Library -> 2 articles
2 Media in Leiden -> 4 articles
2 Parks in Leiden -> 1 article
2 People from Leiden -> 2 subcats, 303 articles
3 Aldermen of Leiden -> 6 articles
3 Members of the Leiden Guild of Saint Luke -> already queried
2 Rijksmonuments in Leiden -> 8 articles
2 Sport in Leiden -> 2 articles
21 unique categories scanned, with in total 1090 unique articles (namespace 0), in 2 seconds.