The Sedlec Ossuary, also known as the Bone Church, is one of the most unusual and famous landmarks in the Czech Republic. It is located in Sedlec, a district of Kutná Hora, about 80 km east of Prague.

The ossuary is part of the Church of All Saints, a Gothic chapel built in the 14th century within the grounds of the former Cistercian monastery. It contains the skeletal remains of an estimated 40,000 to 70,000 people, many of whose bones have been artistically arranged into decorative features throughout the chapel.

Today, the Sedlec Ossuary is one of the most visited tourist attractions in the Czech Republic and serves as a powerful reminder of mortality, expressed by the Latin phrase"Memento Mori" ("Remember that you must die").

The Cathedral of the Assumption of Our Lady and Saint John the Baptist was built between 1280 and 1320 as part of the oldest Cistercian monastery in Bohemia. After being destroyed by the Hussites in 1421, it remained in ruins for centuries.

At the beginning of the 18th century, it was restored by the renowned architect Jan Blažej Santini-Aichel, who combined Gothic and Baroque elements into a unique architectural style known as Baroque Gothic.

The cathedral is approximately 87 metres long and is considered one of the most important Gothic churches in the Czech Republic. It is located just a few minutes' walk from the famous Sedlec Ossuary (Bone Church).

St. Barbara’s Church is considered one of the most beautiful Gothic buildings in Central Europe and is a symbol of the wealth and importance of medieval Kutná Hora, which was one of the most significant cities in the Kingdom of Bohemia during its time. Since 1995, the church, together with the historic centre of Kutná Hora, has been listed as a UNESCO World Heritage Site.

Construction of the church began in 1388 at the initiative of wealthy citizens of Kutná Hora, who wanted to build a magnificent church that could rival the great religious buildings of Prague. The project was financed largely by the profits generated from the town's prosperous silver mines.