A marvelous piece of architecture designed by the famed architect Lutyens and constructed under the direct supervision of Sir Herbert Baker, Parliament House is designed as a circular structure. The House is 171 meters in diameter and about one-third of a mile in circumference. The two semicircular house chambers flank the Central Hall with its impressive dome. The building has a continuous open corridor on the first floor fringed with a colonnade of 144 creamy sandstone pillars. The exterior walls of red sandstone are carved in geometric patterns that echo Moghul jaalis.