What are the architectural styles of the buildings shown in the images?

Analysis of Architectural Styles:

The images display religious and historical buildings, likely from Russia, given the context of the webpage elements visible.

Image 1 (Top Left):

This image shows a prominent red brick tower with ornate details, multiple levels, and a pointed roof topped with a star. This is characteristic of Russian Revival or Neo-Gothic styles, often seen in Kremlin towers, such as the Spasskaya Tower of the Moscow Kremlin.

Image 2 (Middle Left):

This image features a white stone building with multiple golden domes, arched windows, and decorative friezes. The style is distinctly Russian Orthodox architecture, common for cathedrals and churches within the Moscow Kremlin and other historical Russian cities. The onion-shaped domes are a hallmark of this style.

Image 3 (Main, Largest):

This is a detailed view of a large white stone cathedral with numerous domes. The central dome is particularly large and golden, with smaller domes surrounding it. The intricate detailing, white stone facade, and multiple gilded onion domes are definitive features of Russian Orthodox architecture, specifically from the period of the Grand Duchy of Moscow or the Tsardom of Russia. This appears to be the Cathedral of the Dormition or Cathedral of the Archangel within the Moscow Kremlin.

Image 4 (Bottom Left):

This smaller image shows a building with multiple domes, similar in style to Image 2 and the main image. It also exhibits characteristics of Russian Orthodox architecture, with domed roofs and traditional facade decorations.

Conclusion:

The primary architectural style observed across the images is Russian Orthodox architecture, characterized by onion domes, white stone facades, and ornate detailing. One image also strongly suggests the Russian Revival or Neo-Gothic style, commonly found in Kremlin towers.

Answer: Russian Orthodox architecture and Russian Revival (Neo-Gothic).