Oil magnate Władysław Długosz is laid to rest in the mausoleum with his closest family, his wife Kamila, his sons Tymoteusz and Tadeusz, his granddaughter Zofia Warmuz and her daughter Ewa, as well as his grandson Jerzy, his daughter Maria's husband Aleksander Ostoja-Zawadzki and others from his entourage. Władysław Długosz, who lived from 1864 to 1937, was a pioneer in the development of the oil industry in Poland, a senator, MP and minister from Galicia. Construction of the mausoleum began in the 1920s. The project, designed by an unknown architect, was completed in 1928. Among the builders from the Subcarpathian region was the owner of a stone workshop, Stanisław Piątkiewicz from Sanok.

The monumental base of the mausoleum, built of sandstone blocks, transitions into a staircase of several steps leading up to it. The sheet metal-clad door, decorated with floral motifs, and the staircase are guarded by four massive lion statues and decorated with two stone vases. A side entrance leads to the cradle crypt. The building is surrounded by 18 Doric columns that taper upwards. A triangular pediment crowns the façade with a relief of the figure of Christ. The gabled sheet metal roof is decorated with palm leaf-shaped elements. Inside the chapel is an altar dating from 1935. The Mausoleum of the Długosz Family impresses with its appearance and is an architectural gem after renovation. After completing two years of restoration work at the mausoleum, a commemorative plaque was unveiled. A fence separates the building from the cemetery.