St. George Cathedral "over the top" in Kaluga standing in the street Bauman. It was built in 1701 district superintendent I. K. Korobov. The name of this temple is due to its location. Local peasant dialect "riding" was defined as a ravine. So, "over the top" meant "beyond the ravine".

The temple is two – storey with a hipped bell tower. From afar he attracts attention with its slim proportions and elegant architectural details. The building is built in the spirit of temple architecture in the style of "Moscow Baroque".

Almost completely preserved building and the exterior finish of the temple. The temple is crowned with five domes. Its height is about 43 m, length – 32 m, on the sides of the second floor gallery, which is situated on four Romanesque arches. The original galleries were open, but at the end of 1776, they were covered roof, which each side supported by five square columns. In the postwar period the gallery is fully glazed. On both sides of the gallery and the second floor are the stairs. The walls of the upper Church from the outside is decorated with crosses. The temple has a hipped roof with five spires.

The altar of St. georgeís Church has a traditional three-part division. The door trim is made in Russian style. On the first floor are three chapels: the main – in honor of the Martyr St. George, North – in honor of St. John the Baptist, South in honor of the icon "assuage my sorrows".

On the top floor of the temple is a chapel in honour of the exaltation of the cross. The temple, located on the second floor, was painted in 1766-1767 the Lower Church were painted in the early 20th century Refectory of the lower temple is painted in 1999, the Iconostasis of the upper Church consists of five tiers and refers to 1770-80, His ceiling carving is in the style of Moscow Baroque.

Three-tiered quadrangular bell tower of St. George Cathedral bears an octagonal ring, which is completed with a high tent top. The lower tier reinforced buttress which gives the architecture of the building view of the fortress wall.

In the period from 1926 to 1999, St. George's Cathedral was the Cathedral. In 1934-1937 in the Cathedral served as the future St. Augustine (Belyaev). Thanks to Bishop Augustine St. George Cathedral continued his spiritual life. Bishop Augustine was shot in 1937 Along with him were arrested and other Cathedral clergy, many of whom were later executed. But the service in St. George's Cathedral continued until the 1940's when the Cathedral was briefly closed, but in the same year was re-opened.

Currently in St. George's Cathedral is a miraculous Kaluga icon of the Mother of God, which is the main Shrine of the Kaluga land. In the lower Church are particularly honored: the icon "assuage my sorrows" (which was written specially commissioned merchant Sysoev, who was miraculously healed in königsberg), the icon of the Savior, the icon of St. Nicholas, icon of St. George the Martyr, the Holy martyrs Gurias, Samonas and Aviv, the great Martyr Paraskeva. In the upper temple of Jerusalem is revered icon of the Mother of God (1740, the icon-painter Simon M.).

Since 1960, St. George's Cathedral is an architectural monument of national importance.

In may 1999, was consecrated cross, which is dedicated to the memory of all who worked in the Kaluga diocese, standing near the St. George Cathedral. After 1999, when it was restored Holy Trinity Cathedral, St. George's Church ceased to be a Cathedral, but retained the status of a Cathedral. At the Cathedral since 1990, operates a Sunday school, which became the first in the Kaluga diocese (until 1918 when the Church there was a parish school, located next to the Cathedral).

In the late 19th century during his visit to Kaluga in the Cathedral held a service of John of Kronstadt. In memory of this event in the altar of St. George Cathedral is a memorial bronze plaque. In St. George's Cathedral also committed service: Patriarch of Moscow Alexy II, Metropolitan Washington Theodosius, Patriarch parthenius of Alexandria III.

In 2007, St. George's Church was transferred to the ownership of the Kaluga diocese.