How Constantinople Hid a Reservoir the Size of a Cathedral Underneath Its Own Streets

How Constantinople Hid a Reservoir the Size of a Cathedral Underneath Its Own Streets Discover the astonishing secret beneath ancient Constantinople: a massive, cathedral-sized reservoir ingeniously hidden right under its bustling streets. This video delves into the incredible Byzantine engineering that created this vital underground water supply, exploring how it was built and why it remained largely concealed for centuries. Uncover the marvel of this ancient hidden reservoir and its crucial role in the city's survival.