Teoloyucan
![Treaty of Teoloyucan](/Images/godic/202502/15/Firma_de_los_Tratados_de_Teoloyucan3705.jpg")
Teoloyucan is a city and municipality located in Mexico State, Mexico. It lies 45 km (28 mi) north of the Federal District (Distrito Federal) in the northeastern part of the state of México, and is part of the Greater Mexico City urban area. During the colonial period the area's name had a number of variations, including Teohuilloyocan, Teohuilloyucan, Theoloyucan, Teoloyucan Coaquileque and Tehuilloyocan. The name comes from Náhuatl meaning place of glass or place of crystal rock.