Rozhdestvenskaya (Nativity) Churh and St. Aleksandr Nevsky Cathedral
The Theotokos Nativity Church in the Russian baroque style is a masterpiece of the regional and Russian architecture. It was built in the early 17th century, funds given by the famous Stroganov, who owned salt mines. The church is beautifully decorated with an ornate golden carved iconostasis.
The New Fair or Alexander Nevsky Cathedral looks very monumental and reminds of a medieval castle, it was built in the late 19th century funds given by local merchants. (source)
Thank you Xenia!