Period II lasted between 1 CE to 350 CE. During this era Teotihuacan exhibited explosive growth that caused it to be the largest metropolis in Mesoamerica. Factors influencing this growth include the destruction of other settlements due to volcanic eruptions and the economic pull of the expanding city. This influx of new residents caused a reorganization of urban housing to the unique compound complexes that typify Teotihuacan. This period is notable both for its monumental architecture and its monumental sculpture. During this period, the construction of some of the most well known sites of Teotihuacan, the Pyramids of the Sun and Moon, was completed. Further, the shift of political power from the Temple of the Feathered Serpent and its surrounding palace structure to the Street of the Dead Complex occurred in this period sometime between AD 250 and 350. Some authors believe that this represents a shift from centralized, monarchical political system to a more decentralized and bureaucratic organization.