Brzostowo is a village in the Greater Poland Voivodeship, in Piła County, also known by its German name Arnshöh from the years 1942–45. Located in northwestern Poland, near the Noteć River, it has a rich history dating back to 1420. The village consists of three parts: Old Brzostowo with a palace and a historic park, a new section with residential blocks, and Mariana, where a manor farm once existed. Brzostowo features historical monuments such as a palace from around 1900, which was converted and served as an agricultural school, and the Rosenau family burial chapel, also destroyed during World War II. Local folk traditions are cherished, and residents actively participate in municipal harvest festivals and church fairs. Brzostowo's history includes the Old Polish period when it was a town and an administrative center. Many noble families resided here, and there was a Protestant church that burned down in 1864. During World War II, the village was a site of military action, and its German name was part of the Germanization process. In 1945, Brzostowo was liberated by the Red Army. After the war, the village underwent various administrative changes, and its town status was abolished in 1973. Demographic data indicates a small population, with 592 residents in 2011. The village is also home to the Michał Drzymała School Complex of Agricultural Education Center, highlighting its educational significance. Brzostowo is known for diverse economic activities, including micro-enterprises. An interesting anecdote involves the legendary mismanagement of the estate by Otto Berlinicke, who had a tendency toward bankruptcy. Brzostowo combines rich architectural and historical heritage with active cultural and social life, making it an interesting location on the map of Poland.