Abstract: ALMA is the largest radio-astronomy project in the world, a telescope with a revolutionary design, composed by 66 high-precision antennas that observe the Universe in (sub)millimetre wavelengths, between 0.3 and 9.6 mm. With its unprecedented sensitivity and resolution, ALMA is changing our knowledge of the cold Universe and opens a window towards the young Universe, the first stars and galaxies as well as the molecular gas and the interstellar dust.

In this talk, I will present the history, the technology and the future developments of ALMA and I will go over some of the most exciting discoveries made with this extraordinary facility during the 10 years since its inauguration.