Which architectural order is based on Etruscan architecture and features unfluted columns?

The Tuscan order is indeed based on Etruscan architecture and is characterized by its simplicity and sturdiness, featuring unfluted columns. This architectural style emphasizes a sense of solidity and functional design. The Tuscan column typically has a plain capital and a square base, contributing to its understated appearance, which is reflective of the more robust nature of Etruscan architectural traditions.

In contrast, the Ionic and Corinthian orders, which are both part of classical architecture, feature fluted columns and elaborate capitals. The Ionic order, with its scroll-like volutes, and the Corinthian order, known for its ornate foliage decoration, represent a more decorative approach that evolved later than the Tuscan style. The Composite order, which is a combination of the Ionic and Corinthian styles, also does not align with the characteristics of unfluted columns found in the Tuscan order.

Thus, the Tuscan order is a direct connection to Etruscan influences with its hallmark of unfluted columns set against a backdrop of simplicity and strength.