Gravitational wave detectors and the multimessenger astronomy

Ground based gravitational detectors will soon reach a sensitivity such that a first direct direction is plausible. I will briefly recall the basics of gravitationalfirst direct direction is plausible. I will briefly recall the basics of gravitational wave physics and the main sources for terrestrial detectors. Then I will then give a summary of the main observational results obtained so far and will discuss the perspectives for the next years.