Onion domes are a distinctive architectural feature commonly found in Russian churches and other buildings. They are characterized by their bulbous, rounded shape that tapers to a point, resembling the layers of an onion. These domes are often brightly colored and decorated with intricate patterns, making them visually striking and easily recognizable. The design of onion domes serves both aesthetic and practical purposes. They help to shed snow and rain, preventing water accumulation on the roof. Additionally, the unique shape allows for a spacious interior, creating a sense of grandeur within the church while also symbolizing the connection between heaven and earth.