 The Ballcourt consists of Structures 22 and 23 , it was used for the ceremonial Mesoamerican ballgame . It is an I @-@ shaped sunken ballcourt with sloping walls . The two structures forming the sides of the ballcourt once supported buildings , now only the lower sections of their walls remain . The ballcourt is oriented northwest to southeast and is 48 metres ( 157 ft ) long . 
