Two-point functions at two loops in three flavour chiral perturbation theory

The vector and axial-vector two-point functions are calculated to next-to-next-to-leading order in Chiral Perturbation Theory for three light flavours. We also obtain expressions at the same order for the masses, m_π², m_K² and m_η², and the decay constants, F_π, F_K and F_η. We present some numerical results after a simple resonance estimate of some of the new O(p ⁶) constants.