In the town of Borovichi, but rather in the very center, on the square, Gagarin was Vvedensky Cathedral. Not far from the bell tower of the cathedral in 1835 began construction of a new cathedral, which is developing a project for the provincial architect M. Law. During the construction works supervisor was appointed Borovichsky painter, architect Marin EI Planned construction work was completed in 1859. The solemn consecration of the cathedral took place in 1862, it was consecrated in honor of the Holy Trinity.

The temple was built on a high and picturesque place is decorated in the Empire style, and in form it resembled a cross. Church facades on three sides by beautiful porticos highlighted several columns that complete with altar apse created Kreschaty rectangular floor plan. Decoration of the Cathedral was carried out with the help of five chapters, equipped with gilded crosses. The central cross, there was a picture of Jesus Christ. Thus, the five-domed cathedral was built, and has a massive middle drum, from all sides surrounded by four small, particularly beautiful and picturesque looks. Trinity Cathedral today is one of the most interesting and unusual samples of the late Classical style, used in religious architecture. In the interior of the cathedral square is presented.

The Cathedral Chapter and the ceiling is firmly supported by four massive pillars of huge made to look like marble. The temple was made a cold, summer and had three altars. The main altar was consecrated in honor of the Blessed Trinity; the right side is a throne in the name of Our Lady of Kazan. According to ancient legend, the icon was saved this holy Russia in the 17th century by the invasion of the invaders. On the left side of the temple throne was consecrated in the name of the Apostles Peter and Paul, which was done in memory of one of the thrones of the ancient cathedral of Borovichi. The main cathedral iconostasis was made larger, square-shaped and three-tiered, and looked very rich, as was performed in the classical style according to the project of professor of painting from St. Petersburg Gornostaeva. Throughout 1905, all three of the iconostasis were completely painted.

In the central chapter very clearly distinguished the holy image of the Lord of hosts, which was surrounded by the angels, and the whole head was covered with amazingly beautiful with the help of the stars overhead. The slope of the cathedral chapter were listed following the evangelists: Matthew, Luke, John and Mark. From the outside, in the apse there was a representation of the Old Testament Trinity, which is a list of the holy icon of St. Andrei Rublev. Above the door leading inside, from the north, in a small semicircle, it was written in the face of the Blessed Virgin Mary, and the south side - Entry into Jerusalem. On the southern, northern and western sides of the Trinity Cathedral decorated porch, on each of which there were seven steps made of smooth rough stone. The upper part of each porch supported by several impressive columns.

Rector was appointed Archpriest of the Cathedral of the Transfiguration of Cosmas, who worked hard for the benefit of the cathedral. In 1915 he became rector Archpriest Michael Ilyinsky.

In 1909 he visited the Cathedral of the Holy Trinity, Bishop Andronicus Tikhvin, which hit the amazing view of the majestic cathedral. In 1927, the cathedral decided to retool for the city theater. In 1930 he had his head ripped off, dismantled tower. As a result, the temple lost its historical and artistic significance, value urban development, it has ceased to be the spiritual center of the city.

It is known that the temple stood near the bell tower with 12 bells and erected in 1785. It was believed that the cathedral tower should not be destroyed, but still it was blown up and literally taken away brick by brick. Currently, the former building of the cathedral is the City House of Culture.