Briliant, Oscar (1911). „Budapest“. In Chisholm, Hugh (red.). Encyclopædia Britannica (anglų). 04 (11th leid.). Cambridge University Press. p. 734–737. Nuoroda tikrinta 2023-03-26. „This fortress and palace were built by King Bela IV. in 1247, and were the nucleus round which the town of Buda was built, which soon gained great importance, and became in 1361 the capital of Hungary.“