Integrated Buildings & Structures

I'm back home from a fabulous trip to Peru and marveling at Inca ruins in Cusco, Ollantaytambo, and Machu Picchu.  The sophistication of their structures is remarkable, as testified by their integrity after 600 years. Has anyone in this community studied Inca design practices to mitigate seismic loading, and what can you share? I've found insights from an internet search, but nothing as comprehensive as I would like.