late 6th/early 7th century, the polity at Dzibanché moved to Calakmul in order to establish a more strategically placed capital. After Calakmul's power dwindled in the 8th century, after the rule of Yuknoom Took K'awiil, it appears that the bat emblem glyph made its resurgence. Still, many uncertainties remain and new epigraphical studies have to be done to fill the gaps. History Calakmul has a long occupational history and excavations have revealed evidence from the Middle Preclassic right through to the Postclassic. The causeway network that linked Calakmul with the cities of El Mirador, Nakbe and El Tintal suggest strong political links between the four cities that may have begun in the Preclassic, when both Calakmul and El Mirador were important cities, and continued into the Classic period when Calakmul itself was the most powerful city in the region. Calakmul was one of the largest and most powerful ancient cities ever uncovered in the Maya lowlands. Calakmul vs. Tikal The history of the Maya Classic period is dominated by the rivalry between Tikal and Calakmul, likened to a struggle between two Maya "superpowers". Earlier times tended to be dominated by a single larger city and by the Early Classic Tikal was moving into this position after the dominance of El Mirador in the Late Preclassic and Nakbe in the Middle Preclassic. However Calakmul was a rival city with equivalent resources that challenged the supremacy of Tikal and engaged in a strategy of surrounding it with its own network of allies. From the second half of the 6th century AD through to the late 7th century Calakmul gained the upper hand although it failed to extinguish Tikal's power completely and Tikal was able to turn the tables on its great rival in a decisive battle that took place in AD 695. Half a century later Tikal was able to gain major victories over Calakmul's most important allies. Eventually both cities succumbed to the spreading Classic Maya collapse. The great rivalry between these two cities may have been based on more than competition for resources. Their dynastic histories reveal different origins and the intense competition between the two powers may have had an ideological grounding. Calakmul's dynasty seems ultimately derived from the great Preclassic city of El Mirador while the dynasty of Tikal was profoundly affected by the intervention of the distant central Mexican metropolis of Teotihuacan. With few exceptions, Tikal's monuments