File:Katwijk flag.pngFile:Katwijk vlag.svg is a vector version of this file. It should be used in place of this PNG file when not inferior. File:Katwijk flag.png → File:Katwijk
File:Katwijk flag outline.pngNederlands: Flag of the Dutch town of nl:Katwijk (Zuid Holland), outlined version for use against a light background. https://creativecommons.org/publicdomain/mark/1
File:Katwijk vlag.svgcommune neerlandaise de Katwijk. Nederlands: Vlag van de Zuid-Hollandse gemeente Katwijk. Date 2011 Source File:Katwijk flag.png SVG is Own work Author
File:Valkenburg zh flag.pngDescriptionValkenburg zh flag.png English: Flag of the Dutch municipality of Valkenburg (ZH), own work. Source Own work Author Quistnix