The ancient civilization that built the city of Tikal in present-day Guatemala is the Maya civilization. Tikal was one of the largest and most influential city-states in the Maya lowlands during the Classic period, flourishing from approximately 200 to 900 AD. The city is known for its impressive architecture, including towering pyramids, ceremonial centers, and sophisticated urban planning. Tikal's strategic location and abundant resources facilitated trade and cultural exchange. Declining around the 10th century, Tikal experienced periods of resurgence but eventually fell into ruin. Today, it remains a UNESCO World Heritage Site and continues to be an essential focus for archaeological research on Maya history and culture.