The podcast episodes on the First Persian Empire and the Tartarian Empire both touch on the topic of ancient architecture and engineering, highlighting the architectural marvels and cultural achievements of these advanced civilizations.

In the episode The First Persian Empire, the podcast explores the architectural wonders of the Persian Empire, particularly the construction of the magnificent city of Persepolis and its ceremonial buildings, which showcase the empire's cultural and engineering prowess.

The episode Tartaria delves into the theory of the Tartarian Empire, an alleged advanced ancient civilization that was supposedly destroyed by a catastrophic mud flood in the 19th century. The discussion of ancient ruins and architectural marvels, such as the buildings showcased at the 1893 Chicago World's Fair, is a relevant topic in the context of exploring evidence for advanced ancient civilizations like the Tartarian Empire.