An atrium and a propylaeum gave a total length of 475 feet.    From Wordnik.com.  [The Catholic Encyclopedia, Volume 7: Gregory XII-Infallability] Reference

Here the visitor found another portal or propylaeum of a magnificent character.    From Wordnik.com.  [The Seven Great Monarchies Of The Ancient Eastern World, Vol 2. (of 7): Assyria The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.] Reference

The great gateway or propylaeum is very imposing, and rather out of place; but that is not the architect's fault.    From Wordnik.com.  [Rides on Railways] Reference

On the lower portion of the platform were several detached buildings, the most remarkable being a huge gateway or propylaeum, through which the entrance lay to the palace from the city.    From Wordnik.com.  [The Seven Great Monarchies Of The Ancient Eastern World, Vol 2. (of 7): Assyria The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.] Reference

The mode of access has not been discovered, but is presumed to have been by a flight of steps, not directly opposite the propylaeum, but somewhat to the right, whereby entrance was given to the great court, into which opened the main gateways of the palace itself.    From Wordnik.com.  [The Seven Great Monarchies Of The Ancient Eastern World, Vol 2. (of 7): Assyria The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.] Reference

Towards the north-east the existing ruin is prolonged in an irregular manner and it is imagined that this prolongation marks the site of a vestibule or propylaeum, originally distinct from the tower, but now, through the crumbling down of both buildings, confused with its ruins.    From Wordnik.com.  [The Seven Great Monarchies Of The Ancient Eastern World, Vol 4. (of 7): Babylon The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.] Reference