Final answer:
The spaces between the triglyphs in a Doric entablature are called metopes. These were square spaces filled with decorative elements, playing a significant role in both the architectural structure and aesthetic appeal of Doric temples.
Step-by-step explanation:
The spaces between the triglyphs in a Doric entablature are called metopes. These square spaces were often filled with either painted or sculpted decoration. In the construction of Doric temples, such as the Parthenon, these metopes represented an important architectural and decorative element.
The Parthenon, with its combination of Doric and Ionic elements, is a prime example of this architectural achievement. Skilled sculptors and architects of the time mastered the use of metopes to create a harmonious design that stood the test of time, leaving us with some of the most iconic architectural features from ancient Greece.