Ecclesiastical architecture of Heliurgy

Heliurgic churches are built around access to the limited hours of sunlight. They tend to feature a panoramic window (usually double- or triple-glazed against the cold) facing south, and the main doors traditionally face the first rays of the rising sun at the summer solstice. Traditionally, these doors would be flung open as the sunlight touched them, though as cities grew larger and buildings grew taller, most urban churches now have spires above the door containing an elaborate system of mirrors to capture the light high above the congestion and re-emit it through an objective lens in the narthex. Generally only the most notable churches in large cities will have the political clout to compel a protected sightline.
The churches also by tradition have a tall tower north of the main building, known as the heliopticon. These developed as a way of observing and predicting the weather, and continue to play a crucial role in Linnadean meteorology to this day.