Cojanu (formerly Gura Aninoasei) is a village in Berca commune, Buzău county, Muntenia, Romania. At the end of the 19th century, the village was the seat of the Gura Aninoasei commune, which included the villages of Băceni, Botanu, Gura Aninoasei (today Cojanu), Rătești, Țâțârligu and Viforâta, with 1,260 inhabitants. The Rătești monastery was loca