Old World for Giant People? What happened to the Civilized Giants?

Were the previous people double our size? Twice as big as we are today? The old buildings have doors and windows that look logical for people between 3 and 4 metres. What happened in the 1800s? A new repopulation of the world? If you like my channel: ▸ Instagram: ▸ Patreon: (currently not posting new content) ▸ PayPal: ▸ Shop: ▸Facebook: ▸Twitter: