The photoionization of the four-electron beryllium-like isoelectronic series from the neutral to Fe +22 has been studied for ground 1 S and metastable 3 P initial states. The wave functions of the final-state (target) ions were built using the CIV3 code. Both nonrelativistic LS-coupling R-matrix and relativistic Breit-Pauli (BP) R-matrix methods were used to calculate the cross sections in the photon-energy range between the first ionization threshold and the