Sikorski, German Foreign Minister Johann Wadephul and France's top diplomat Jean-Noël Barrot were discussing the challenges facing Europe, including European security, continued support for Ukraine in its war against Russia's invasion and prospects for further trilateral cooperation, Poland’s foreign ministry said.
The three ministers began talks on Wednesday evening and were officially welcomed on Thursday by the premier of the eastern German state of Thuringia and the mayor of Weimar.
They also visited the home of the famous German writer Johann Wolfgang Goethe.
The talks also addressed recent developments in European security, including Berlin's announcement earlier this week that Russia was behind an attempted armed drone attack at Leipzig Airport in eastern Germany last month.
The meeting was expected to review the results of 35 years of cooperation between Warsaw, Paris and Berlin, according to the Polish foreign ministry.
The Weimar Triangle was established in August 1991 at a meeting in Weimar of the-then foreign ministers of Poland, Germany and France: Krzysztof Skubiszewski, Hans-Dietrich Genscher and Roland Dumas.
The format was created to help overcome divisions in Europe and bring Poland closer to European and Euro-Atlantic institutions.
Poland joined NATO in 1999 and the European Union in 2004.
The Weimar Triangle has since become a platform for dialogue and for seeking common solutions to European policy issues among the governments in Warsaw, Berlin and Paris.
The three countries have also cited the format as a mechanism for coordinating their positions on major issues affecting Europe.
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Source: IAR/PAP