  After the discovery of the top quark more than 20 years ago, its properties
have been studied in great detail both in production and in decay. Increasingly
sophisticated experimental results from the Fermilab Tevatron and from Run 1
and Run 2 of the LHC at CERN are complemented by very precise theoretical
predictions in the framework of the standard model of particle physics and
beyond. In this article the current status of top-quark physics is reviewed,
focusing on experimental results, and a perspective of top-quark physics at the
LHC and at future colliders is given.
