▁and ▁upper ▁levels ▁both ▁measured ▁ ▁high . ▁This ▁first ▁phase ▁was ▁completely ▁covered ▁by ▁the ▁second ▁phase ▁of ▁construction , ▁executed ▁in ▁three ▁sub - ph ases ▁( label led ▁ 2 A , ▁ 2 B ▁and ▁ 2 C ). ▁This ▁was ▁built ▁in ▁a ▁style ▁very ▁similar ▁to ▁that ▁of ▁the ▁first ▁phase , ▁first ▁with ▁the ▁extension ▁of ▁the ▁lower ▁two ▁levels ▁while ▁still ▁using ▁the ▁earlier ▁top ▁level ; ▁a ▁new ▁third ▁level ▁was ▁added ▁later , ▁completely ▁covering ▁the ▁previous ▁version . ▁The ▁lower ▁two ▁levels ▁were ▁first ▁raised ▁to ▁ ▁high ; ▁the ▁middle ▁level ▁was ▁then ▁raised ▁an ▁additional ▁ ▁and ▁the ▁upper ▁level ▁was ▁increased ▁to ▁ ▁high . ▁Finally , ▁a ▁fourth ▁level ▁was ▁added ▁to ▁the ▁py ram id , ▁bringing ▁its ▁total ▁height ▁to ▁. ▁During ▁the ▁third ▁phase ▁of ▁construction , ▁the ▁structure ▁was ▁increased ▁from ▁four ▁to ▁five ▁levels . ▁The ▁levels ▁varied ▁in ▁height ▁between ▁them , ▁meas uring ▁, ▁, ▁, ▁ ▁and ▁ ▁respectively . ▁The ▁fourth ▁and ▁final ▁construction ▁phase ▁was ▁badly ▁dam aged ▁by ▁the ▁collapse ▁of ▁the ▁structure ▁in ▁ 2 0 0 4 . ▁ ▁Other ▁structures ▁Str ucture ▁B 1 - 3 ▁and ▁Str ucture ▁B 1 - 4 ▁are ▁the ▁two ▁structures ▁that ▁compr ise ▁the ▁ball court . ▁Test ▁p its ▁exc av ated ▁during ▁the ▁first ▁de cade ▁of ▁the ▁ 2 1 st ▁century ▁found ▁the ▁mort ar ▁floor ▁of ▁an ▁I - sh aped ▁ball