St. Isaac’s Cathedral is the work of French architect Augusto Monferrand, the most sumptuous and magnificent churches of St. Petersburg, whose construction lasted from 1818 to 1858. The construction of this colossal building was an engineering challenge. Thousands of wooden piles to sustain the 300,000 tons of weight embedded in the marsh. 4 Monumental covers are made of monolithic granite columns 17 meters high, weighing 114 tons each. The three oak doors and bronze, weighing 20 tons, are decorated with reliefs by sculptor Vitali and depict scenes from the life of Christ and the saints. The golden dome on a high drum with square columns, reaches 102 m in height; around there are 4 towers and a multitude of statues dot the roof. The interior, rich in gold, marble and bronze can accommodate 14,000 people.
The iconostasis adorned with gigantic columns of malachite and lapis lazuli, is covered in mosaics; the window of the altar represents the Resurrection of Christ. Among the testimonies that reconstruct the history of the building include a wooden model of the system used to hoist the columns, the reconstruction of a section of the dome, a wooden model of the church to 1/166 scale and a bust of Montferrand made 14 different types of marble used in the construction of the church.
Now the Cathedral of St. Isaac is classified as a museum and has no religious background, so the input (price included in the cost of the tour) is paid.
It is possible to climb to the colonnade of the dome, where you can enjoy a splendid view of the entire city (paid separately).
Open from 11.00 to 19.00 (in summer from 10.00). Closed Wednesdays. The photos are allowed. Sometimes this visit is combined with the panoramic view. In the cathedral several books and souvenirs shops work.