Learn to read the structural language a fault-line city invented, and walk away able to tell the buildings that fell from the ones still standing.
Start
The Cathedral: What Tall and Slim Costs

The failure specimen: the proportions that did not survive 1773.

The arcade teaches the grammar: many small spans beat a few big ones.

A style caught mid-evolution, and the yard where the next builders trained.

The exception: a thin decorated screen outlived the structure behind it.

A pure lesson in compression: how an arch turns weight into stability.

Earthquake Baroque fully resolved: mass, low massing, and stucco skin.

A circular plan with no corners for lateral force to concentrate.

One courtyard where half fell and half held: read the result directly.

Material, cantera stone, and the literacy to read the whole city.
Dry-season weekday mornings, December through April, eight to noon. The cobblestone streets between the Cathedral, Compañía, La Merced, Capuchinas, and San Francisco are uneven and read best in good light before the midday heat. Rainy season runs roughly May through October with heavy afternoon thunderstorms that can flood the colonial-grade gutters and close ruined-roof sites for safety. Sunday mornings the active churches (the cathedral parish, La Merced, San Francisco) are in use for mass; the exterior architecture is still readable but interior access is restricted. The architecture tour anchors on facades and proportions, which read in any weather, but the wide-frame photographs need morning sun.