Inca vs Colonial Architecture in Cusco, Explained

Walking through downtown Cusco means literally seeing two eras stacked on top of each other: perfect Inca stone walls with Spanish colonial temples built directly on top. This isn't a coincidence.

Why the Spanish built over Inca foundations

After the conquest, the Spanish tore down Inca temples and palaces to build churches and colonial buildings — but instead of destroying the stone bases, they used them as foundations, since Inca structures proved more earthquake-resistant than any Spanish construction of the time.

The Qorikancha: the clearest example

The Qorikancha ("golden enclosure") was the most important temple of the Inca Empire, dedicated to sun worship. On top of its stone walls, the Spanish built the Santo Domingo Convent. Today you can see both layers: the perfectly carved Inca stone base, and the colonial church above. It's a must-see stop on our Cusco city tour.

The Inca stonework technique (no mortar)

Inca walls are made with stones carved to fit together perfectly, with no mortar at all. This technique, combined with walls slightly tilted inward, gives them flexibility against seismic movement — which is why many are still standing 500+ years later, while more rigid colonial structures cracked in historical earthquakes.

The 1950 earthquake: the real-world proof

A major 1950 earthquake severely damaged many of Cusco's colonial buildings, while the underlying Inca walls remained practically intact — a practical demonstration of the Inca technique's earthquake-resistant superiority.

Where to see this fusion today

• Qorikancha / Santo Domingo: the most famous example.
• Hatun Rumiyoc Street: the famous "12-angle stone," part of an Inca wall that today forms the base of a colonial building (now a museum).
• Plaza de Armas: the cathedral was built over what was the palace of Wiracocha Inca.

If you're into history and architecture, our guides go deep into every detail during the Cusco city tour.

Frequently asked questions

Why don't Inca walls use cement or mortar?

Stones were carved with precision to fit together perfectly, which besides being aesthetic, gave the structure seismic flexibility.

Can you visit the inside of the Qorikancha?

Yes, both the Inca part and the colonial part (Santo Domingo Convent) are open to visitors with a ticket.

What other sites show this fusion besides the Qorikancha?

Hatun Rumiyoc Street (the 12-angle stone) and several Plaza de Armas facades built over Inca foundations.