Which of the following is NOT one of the three classical orders of Greek architecture?

The Baroque style is indeed not one of the three classical orders of Greek architecture. The classical orders are structural systems that define the proportions and style of Greek temples and buildings. The three classical orders are Doric, Ionic, and Corinthian.

Doric is the simplest and most robust order, characterized by its sturdy columns with no base and a plain capital. Ionic features a more slender column, with a base and volutes (scroll-like ornaments) at the capital. The Corinthian order is the most ornate, distinguished by its elaborate capitals adorned with acanthus leaves.

In contrast, Baroque architecture, which developed later in the 17th century, is known for its dramatic use of scale, intricate detailing, and dynamic forms, making it fundamentally different in style and purpose from the classical Greek orders.