Final answer:
The statement is false; the Erechtheion and the Parthenon are separate temples on the Athenian Acropolis, with the Erechtheion built in honor of King Erechtheus and the Parthenon dedicated to Athena.
Step-by-step explanation:
The statement that the Erechtheion, designed by Mnesikles, is the third structure to be constructed on the Parthenon is False. The Erechtheion is an ancient Greek temple on the north side of the Acropolis and was built to honor the legendary king Erechtheus.
Its construction took place between 421-406 BCE. The Parthenon, on the other hand, is a separate temple on the Athenian Acropolis, dedicated to the goddess Athena. It began construction earlier in 447 BCE and was designed by architects Iktinos and Kallikrates.
The two structures are both on the Acropolis but are distinct, and the Erechtheion was not built as part of the Parthenon.
The statement is False. The Erectheion and the Parthenon are two separate structures on the Athenian Acropolis. The Parthenon, designed by Iktinos and Kallikrates, is a temple dedicated to the goddess Athena and was the first structure to be constructed on the Acropolis.
On the other hand, the Erechtheion, designed by Mnesicles, is another temple on the Acropolis, built in honor of the legendary king Erechtheus. So, the Erectheion is not the third structure to be constructed on the Parthenon.