The construction and assembly of the two half barrels of the ATLAS central electromagnetic calorimeter and their insertion into the barrel cryostat are described. The results of the qualification tests of the calorimeter before installation in the LHC ATLAS pit are given

The construction and beam test results of the ATLAS electromagnetic end-cap calorimeter preproduction module 0 are presented. The stochastic term of the energy resolution is between 10% GeV 1/2 and 12.5% GeV 1/2 over the full pseudorapidity range. Position and angular resolutions are found to be in agreement with simulation. A global constant term of 0.6% is obtained in the pseudorapidity range 2.5 < η < 3.2 (inner wheel).