Hrastnik is a town in the Central Sava Valley in central Slovenia. It is the seat of the Municipality of Hrastnik. Traditionally the area was part of the Styria region. The entire municipality is now included in the Central Sava Statistical Region. The town has its own library and school.HistoryIn the past the majority of locals were employed in the glass, coal, or chemical industry. Today the glass and chemicals factories still operate, but many people also go to work in neighbouring towns like Trbovlje or Zagorje ob Savi. Coal started being mined in Hrastnik in 1822. Production was limited until 1849, when the town was connected to the Austrian Southern Railway. Hrastnik is also known for glass manufacturing. The first school was opened in Hrastnik in 1860. It was originally operated for miners' children at the miners' restaurant, but became a public school in 1872. A separate school building was built in 1879. A German-language school was established in 1907 and operated until the end of the First World War.Mass graveHrastnik is the site of a mass grave associated with the Second World War. The Senica Ravine Mass Grave (Grobišče Senicatov graben) is located below an orchard by the house at Pot na Kal no. 2. It contains an undetermined number of victims.ChurchThe parish church in the settlement is dedicated to Christ the King and belongs to the Roman Catholic Diocese of Celje. It was built in 1936. A second church in the south of the settlement, belonging to the same parish, is dedicated to Our Lady of Mount Carmel. It dates to the 16th century with major 17th-century adaptations.