  The Cherenkov Telescope Array (CTA) will be the world's largest and by far
most sensitive observatory for high-energy gamma rays. It will be capable of
detecting gamma rays from extremely faint sources with unprecedented precision
on energy and direction in the energy range from 20 GeV to more than 300 TeV.
The performance of the future CTA observatory derived from detailed Monte Carlo
simulations is presented in this contribution for the two CTA sites in Paranal
(Chile) and on the La Palma island (Spain).
