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\documentclass[hyperref={pdfpagelabels=false}]{beamer}
\usepackage[ngerman]{babel}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
	
\begin{document}

% auf der nachfolgenden Folien funktioniert 'allowframebreaks' nicht
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The 1896 Summer Olympics, officially known as the Games of the I Olympiad, was a multi-sport event celebrated in Athens, Greece, from April 6 to April 15, 1896. It was the first international Olympic Games held in the Modern era. Ancient Greece was the birthplace of the Olympic Games, consequently Athens was perceived to be an appropriate choice to stage the inaugural modern Games. It was unanimously chosen as the host city during a congress organized by Pierre de Coubertin, a French pedagogue and historian, in Paris, on June 23, 1894. The International Olympic Committee (IOC) was also established during this congress. Despite many obstacles and setbacks, the 1896 Olympics were regarded as a great success. The Games had the largest international participation of any sporting event to that date. The Panathinaiko Stadium, the only Olympic stadium used in the 19th Century, overflowed with the largest crowd ever to watch a sporting event. The highlight for the Greeks was the marathon victory by their compatriot Spiridon Louis. The most successful competitor was German wrestler and gymnast Carl Schuhmann, who won four events. After the Games, Coubertin and the IOC were petitioned by several prominent figures including Greece's King George and some of the American competitors in Athens, to hold all the following Games in Athens. However, the 1900 Summer Olympics were already planned for Paris and, except for the Intercalated Games of 1906, the Olympics did not return to Greece until the 2004 Summer Olympics, some 108 years later.
\end{block}
\end{frame}

% auf der nachfolgenden Folien funktioniert 'allowframebreaks'
\begin{frame}[allowframebreaks]
The 1896 Summer Olympics, officially known as the Games of the I Olympiad, was a multi-sport event celebrated in Athens, Greece, from April 6 to April 15, 1896. It was the first international Olympic Games held in the Modern era. Ancient Greece was the birthplace of the Olympic Games, consequently Athens was perceived to be an appropriate choice to stage the inaugural modern Games. It was unanimously chosen as the host city during a congress organized by Pierre de Coubertin, a French pedagogue and historian, in Paris, on June 23, 1894. The International Olympic Committee (IOC) was also established during this congress. Despite many obstacles and setbacks, the 1896 Olympics were regarded as a great success. The Games had the largest international participation of any sporting event to that date. The Panathinaiko Stadium, the only Olympic stadium used in the 19th Century, overflowed with the largest crowd ever to watch a sporting event. The highlight for the Greeks was the marathon victory by their compatriot Spiridon Louis. The most successful competitor was German wrestler and gymnast Carl Schuhmann, who won four events. After the Games, Coubertin and the IOC were petitioned by several prominent figures including Greece's King George and some of the American competitors in Athens, to hold all the following Games in Athens. However, the 1900 Summer Olympics were already planned for Paris and, except for the Intercalated Games of 1906, the Olympics did not return to Greece until the 2004 Summer Olympics, some 108 years later.
\end{frame}

\end{document}