Saint Andrew's Church is a remarkable example of Baroque architecture, built between 1747 and 1754. The church stands at an impressive 50 meters (160 feet) tall, with a length of 31.7 meters (104 feet) and a width of 20.4 meters (67 feet). Its size and ornamental design make it a striking sight on the cityscape.
The construction of both the exterior and interior decorations took place at the same time. Cast iron floor slabs were specially transported from Moscow, highlighting the importance of using durable and high-quality materials for the project. Artisans created detailed forms for the windows, doors, and walls, as well as for the area beneath the large central cupola.
The impressive iconostasis, designed by the Italian architect Rastrelli, became a centerpiece of the church’s interior. To keep the project moving quickly, the wood for the iconostasis, altar canopy, pulpit, and the tsar’s seat was carved in Saint Petersburg. The icons for the iconostasis were painted by artists from Petersburg, adding to the church’s rich artistic legacy.
Gilding played a significant role in the church’s interior decoration. A total of 1,028 gold slabs were used to cover various surfaces in the interior, creating a gleaming and luxurious atmosphere that reflects the grandeur and religious significance of Saint Andrew's Church.
Source - https://en.wikipedia.org/wiki/St_Andrew%27s_Church,_Kyiv