プレーク・ピブーンソンクラーム
Due to its strategic location, in 1943 Mueang Phetchabun was proposed as the new capital of Thailand, to be named "Nakhonban Phetchabun" (นครบาลเพชรบูรณ์). This proposal, by Prime Minister Field Marshal Plaek Phibunsongkhram, was not approved by parliament, thus it continued to be a district as before.