Long institute title in Madrid theme of beamer class

Question

I use the beamer documentclass with the Madrid theme and the beetle color theme. My institute name is too long for the footer, so I'd love to use the long name on the title slide and a shortened version ("Universität Bonn") in the footer. Is there any way to do this?

\documentclass{beamer}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}

\title{Donald Knuth}
\author{...}
\institute{Rheinische Friedrich-Wilhelms-Universit\"{a}t Bonn}
\usetheme{Madrid}
\usecolortheme{beetle}

\begin{document}
\frame{\titlepage}

\frame{Blubb...}
\end{document}

Answer 1

You can use the optional argument for \institute:

\documentclass{beamer}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}

\title{Donald Knuth}
\author{...}
\institute[Universität Bonn]{Rheinische Friedrich-Wilhelms-Universit\"{a}t Bonn}
\usetheme{Madrid}
\usecolortheme{beetle}

\begin{document}
\frame{\titlepage}

\frame{Blubb...}
\end{document}