- svguidinglight.com konigsberg-castle/
- everipedia.org wiki/lang_en/Königsberg_Castle
- http://world.meros.uz en/wonder/view?id=535
- google.com.ng travel/hotels/entity/…
- castlesworldwide.net castles-of-russia/…
- google.al travel/hotels/entity/…
- google.ie travel/hotels/entity/…
- wikidata.org wiki/Q571409