30th century BC in architecture
# 30th century BC in architecture

## Buildings and structures

### Buildings

* Alvastra pile-dwelling – circa 3000 BC in Neolithic Scandinavia
* Barbar Temple – oldest of the three temples built in 3000 BC, in present-day Bahrain
* Diraz Temple – circa 3rd millennium BCE, in present-day Bahrain
* Tepe Sialk – claimed to be the world's oldest ziggurat built in 3000 BC, in present-day Iran
