Dupnitsa, whilst separate to the Sapareva Banya municiplaity, it is the largest neighbouring town and is where you will find the Notaries Office which serves the municipality of Sapareva Banya.

Dupnitsa is situated around Dzherman River at the northwestern foothills of Rila Mountain and the first town in the Struma Valley . The town is 68 km south of Sofia, and 39 km east of the district town Kyustendil.
History: The first information about the town was recorded in the15th century in the Ottoman register, after the Ottoman invasion. During the 18th and 19-th century the town developed as an iron ore mining centre. The population of Dupnitsa was very active in the national liberation and education movement during the Revival Period. Here was located a girls school, and from this the monastery school developed into a public school soon after its foundation in 1856 – 1857. The town’s industrialization started in 1860 to 1870 and Dupnitsa turned into the centre for tobacco production as well as a significant producer of home woven cloth.

After the Liberation, the name of the town was changed several times. It was called Stanke Dmitrov  as its Communist-era name (Stanketo for short), then Marek and at finally Dupnitsa again. Today Dupnitsa is a well developed industrial and pharmacy centre. For several years now  the town is has become well known for its second hand automobile trading centres. These can be seen just off the main road.

Sightseeing: Just off the modernized main square is a sixteenth-century mosque , whose simple domed structure has an elegance that displays Ottoman architecture's debt to Byzantine church building; it currently houses a bookshop. Behind it is the Okoliiskata kashta , a house of the same period that once served as the konak of the Ottoman governor, and is now a small art gallery.