Vernacular architecture

Etymology

From Latin "vernaculus" (domestic, native), itself from "verna" (a slave born in the master’s house). "Vernacular" already meant the native, local language; applied to building, it means the native, local way of making shelter — learned by custom, not from pattern books.

noun phrase · /ver-NAK-yuh-ler AR-ki-tek-cher/
Building designed from local traditions, materials, and needs rather than by professional architects or formal styles.
What it names
The everyday, unsigned architecture — farmhouses, row houses, adobe dwellings — that fits its climate and culture, and gives it dignity as a subject worth studying.
Example
The thick walls and tiny windows of the region’s vernacular architecture keep the houses cool without any machinery.
Related idea
Vernacular architecture is anonymous building shaped by local custom and climate; monumental or "polite" architecture is consciously designed in a formal style by named architects. One grows from tradition; the other is authored.