Answer:
A rectangular structure with a long central nave
Explanation:
Basilicas originally referred to the ancient Roman public buildings. Courts were held in these buildings and served other public functions. It had door at the one end and a raised platform on the other side, the magistrates and other officials used to sit on the raised platforms. The basilicas were located in the centre of all Roman towns.
Later when Christianity became the official religion of the Roman Empire churches were built on the plans similar to the basilicas. Basilicas had open interior space and its side isles were separated by colonnades.
