After WWI, on 30 April 1920, the town of Berettyóújfalu became the center of Csonka Bihar County. In 1922 great development began: electrification was done, schools, a new Town House, barracks and house for officers were built.

Kazinczy was born there, Bessenyei returned to Bihar and his work was fruitful, change came to Kölcsey in terms of his career while living in Bihar. he understood that he had to bare life. Arany János's classic literary worked was based on traditions of Bihar. Zoltán Nadányi lived in Berettyóújfalu most of his life, as well as representatives of folk literature, Nagy Imrét, Sinka István, Erdélyi József and Szabó Pál.

It was Tardy György who saved the Lame Tower in Herpály. The towers were possibly built in 1170 and belonged to the Benedictine order. Tardy György renovated the towers in 1880 based on his owned design. The father Tardy Sándor found a shield ornament of the Gepida tribe made of iron in 1849. The family donated the finding named "The Shield Wart of Herpály" to the National Museum in 1854.