Campo De' Fiori
Campo de' Fiori literally means "Field of Flowers" as it was a meadow during the Middle Ages. It remained fairly underdeveloped despite some large palazzos nearby (Orsini, Cancelleria, etc.). The streets surrounding the Campo de' Fiori are all named for various trades. During the pontificate of Sixtus IV, the pope added Via Florea and Via Pellegrino. These became part of the Via Papale or the Pope's road, which connected Basilica of St. John Lateran with the Vatican. The construction of these roads brought a fair amount of wealth to the area and many shops and inns opened around Campo de' Fiori. This area was particularly popular for printmakers and print shops.
Spot where history took place
Public executions used to be held in the square. In 1600, Giordino Bruno was burned at the stake and all of his works placed on the Index Librorum Prohibitorum. Bruno advocated several scientific theories such as heliocentrism, the idea that the sun is just another star, and the idea that there are other inhabitable worlds in the universe. However, the main reason for his execution was for his denial of core Catholic doctrine and pantheistic beliefs. A statue now stands in the spot where Bruno was executed, looking defiantly toward the Vatican.
What tourists love about it
The way it changes during the different times of the day, in the mornings is the most famous and ancient street market, selling fruits, vegetables, spices and housewares, but in the mid afternoon, the Piazza is swept clean and fills with tables from the bars and restaurants surrounding the Piazza, offering drinks and wine glasses as aperitivo, and at night, is a completely different area again, filled with young people who crowd the side walks bars. You should visit this Piazza, at least twice!!!