Passage: The entire complex that makes up the Tejo Power Station constitutes an old thermoelectric plant that supplied power to Lisbon and its surrounding area. The building is unique amidst Lisbon's architectural setting, and is one of the most beautiful examples of Portuguese industrial architecture from the first half of the 20th century.Tejo Power Station was built between 1908 and 1951, thereby undergoing several stages of expansion throughout this period. Its structure follows the western type of architecture of iron covered with brick, which shapes and decorates the facades in artistic styles that range from arte-nouveau, in its older sections (low-pressure building), to classicism in the more contemporary parts (high-pressure building). With the station's expansion, additional adjoining terrain and buildings were acquired over the years, becoming the great industrial complex it is today, with various cultural functions, always with the Tagus River, its namesake, in the backdrop.

Question: What type of artistic style is used in Tejo Power Station's more contemporary portions?
classicism