Markets on the move

After previously making the observation about Piazza Navona's calm and unhabited space in the morning, I have found some new and interesting information about the history of the square. It's odd, long, skinny, oval space was once used as a site for an ancient Roman circus. Here, people would gather around to watch atheltic and theatre events. The bizzare shape outlines the circus and horse tracks that took place in the piazza many centuries ago.

In the 15th century, the Piazza was then turned into a city market, which was transferred from the Capitoline Hill.  The same market was then moved to Campo de'Fiori in 1869.  I have not been able to find any information, discussing the reasons for why the market was moved from Piazza Navona to Campo de'Fiori.  Although Campo de'Fiori is a smaller square, maybe the oval shape of Piazza Navona was not suitable for a market, as it became more popular, and the crowds grew larger.

Information obtained from:
http://en.wikipedia.org/wiki/Piazza_Navona
http://www.romainteractive.com/pznavona.htm