The intercolumniation of 1.5 diameters is known as what?

• A. Pycnostyle
• B. Diastyle
• C. Systyle
• D. Areostyle

Answer: (A)

Intercolumn spacing in classical orders is described by specific terms that name how close or wide the columns are set in a peristyle. When the gap between adjacent column centers is about one and a half times the column’s diameter, that arrangement is called pycnostyle. The name comes from Greek roots meaning “close spacing,” which fits a spacing of 1.5 diameters and marks a distinctly tight rhythm for the colonnade.

Why this is the best fit here: 1.5 diameters is right in the range associated with pycnostyle, the close-spaced category. Other terms refer to wider or differently configured spacings (for example, areostyle denotes a particularly wide intercolumniation, while diastyle and systyle describe other, less tightly defined ranges). So the 1.5-diameter gap aligns with pycnostyle, making it the appropriate label for this spacing.