sentences:  Monthon Phetchabun was included as part of Monthon Phitsanulok in 1904 and re-established in 1907.The monthon was again included in Phitsanulok in 1915.Due to its strategic location, in 1943 Mueang Phetchabun was proposed as the new capital of Thailand, to be named "Nakhonban Phetchabun" (นครบาลเพชรบูรณ์).