As an old legend tells, the citizens of Stolzenau persuaded the devil on the pretext that they wanted to build a huge inn to build the church. When he realized what the building was going to be, he wanted to tear it out, pulled it for the top of the tower, but could do little more than twirl it a little. In fact, the 1679-built tower of St. Jacobi Church has a strikingly curved pointed spire, which has become a landmark Proud. Studies show that this special feature of the 45 m high Stolzenauer church tower is a planned carpentry work. In 2007, the tower was extensively renovated. The stone sundial next to the bell windows on the street side dates back to 1737. The oldest of the four bells of the bell tower dates back to 1639 and was already hung in the predecessor tower. The outside hanging clock bells are operated by a mechanical movement from 1887. At the tower of the present church was built in the years 1828 to 1830 in the classicist style. The main feature of the exterior is a mighty main portal in the form of Greek temple facades. The interior of the church was largely restored to its classicistic origin during the last renovation in 1982/1983. Particularly noteworthy are a coffered tonneau ceiling and the classicist pulpit wall with the pulpit altar. The oldest exhibit is a Romanesque baptismal font, which dates back to the wooden church of the Mutterkirche and dates back to around 1200. The large organ with historical prospectus was extensively restored in 2001 by the organ company Rudolf Jahnke and also re-intoned. With its 2166 pipes distributed on 32 registers, it is one of the largest instruments in the southern district of Nienburg.