1 Leiden -> 9 subcats, 14 articles
2 Buildings and structures in Leiden -> 2 subcats, 19 articles
3 Museums in Leiden -> 11 articles
3 Rijksmonuments in Leiden -> 9 articles
2 Culture in Leiden -> 7 articles
2 Economy of Leiden -> 1 subcat, 2 articles
3 Companies based in Leiden -> 2 articles
2 History of Leiden -> 2 subcats, 10 articles
3 People from Leiden -> 5 subcats, 177 articles
4 Aldermen of Leiden -> 6 articles
4 Artists from Leiden -> 1 subcat, 87 articles
5 Members of the Leiden Guild of Saint Luke -> 33 articles
4 Burials at Pieterskerk, Leiden -> 22 articles
4 Mayors of Leiden -> 1 article
4 Sportspeople from Leiden -> 75 articles
3 Rijksmonuments in Leiden -> already queried
2 Leiden University -> 3 subcats, 27 articles
3 Leiden University alumni -> 160 articles
3 Leiden University faculty -> 1 subcat, 320 articles
4 Classical scholars of Leiden University -> 5 articles
3 Manuscripts of Leiden University Library -> 3 articles
2 Media in Leiden -> 4 articles
2 Parks in Leiden -> 1 article
2 People from Leiden -> already queried
2 Sport in Leiden -> 1 subcat, 4 articles
3 Sportspeople from Leiden -> already queried
23 unique categories scanned, with in total 1249 unique articles (namespace 0), in 2 seconds.