Because marble is white.
Marble
Marble.
The marble from the Parthenon came from a local mountain near Athens.
I think it's white marble; now it's like a light gray or white color.
The Parthenon is built of marble and used to contain a statue of the Greek goddess Athena.
Marble
the Athens built the Parthenon
It was builted in 447 the foundation are made of stone and the temple is made of marble. The architects/artists were Iktinos and Kallikrates. The marble was transferred from the nearby mount Pentelicus.
The Parthenon was built for the Greek goddess Athena.
Pericles was the ruler when the Parthenon was built.
The Parthenon
pentilic marble