I hope it is fine to include buildings from all over the world, so here it is: a gate monument with Southeast Asian style. Considering the middle age is from 5th century to 15th century, Southeast Asian architecture style shared similarities throughout the era. They use stones earlier, then bricks later. Most are heavily influenced by Buddhism and Hinduism. Nowadays, you can see the style being used in places like Bali or Thailand.
Feedbacks and suggestions greatly appreciated!