[{WikipediaArticle oldid='204746130'}] %%information %%(font-size: 80%;) !!!License Information of Images on page ||Image Description||Credit||Artist||License Name||File | Opening measures of the String Quartet No. 4 Op. 18 by Ludwig van Beethoven.| Beethoven, Ludwig van: Quartette für 2 Violinen, Bratsche und Violoncello. Breitkopf & Härtel, Leipzig.| Ludwig van Beethoven| [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:BeethovenOp18-4.jpg | Porträt des Ludwig van Beethoven| www.answers.com| Karl Traugott Riedel| [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:Beethoven Riedel 1801.jpg | | http://www.beethoven-haus-bonn.de| August Friedrich Oelenhainz| [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:Fjm Fürst von Lobkowitz.jpg %% %%