Presidents from seven countries were present in the Ukrainian parliament as the man who led the so-called orange revolution was sworn in on Sunday.
Viktor Yushchenko was applauded warmly as results confirming his victory over Viktor Yanukovich in the repeated run-off were read out.
With his hand on an ancient Bible and the constitution he became the third president in Ukraine’s post-Soviet era.
Exactly two months previously he had symbolically taken the oath of presidential office in parliament.
Now, after the real thing, he praised the chamber for helping defend his victory.
Over the coming week Yushchenko is embarking on a European tour. He will visit the Council of Europe, a major rights body, the European Parliament in Strasbourg, and the World Economic Forum in Switzerland.
He will also go to Poland for 60th anniversary commemorations of the liberation of the Auschwitz death camp.