%%!TEX TS-program = pdflatex
\documentclass{article}
\usepackage{amsmath}
\usepackage{picinpar}
\usepackage{tikz}


\begin{document}
Some test before the very long paragraph.

\begin{window}[2, l, {\tikz \draw (0,0) circle (40 pt);}, {Run Around Circle} ]
In this case we center a word printed vertically inside a paragraph. It is not difficult to understand that tables can also be easily included with the \texttt{tabwindow} environment When a paragraph ends, like here, and the window is not yet finished it just ci just continues the past the paragraph boundary, right into the next one(s). In this case we center a word printed vertically inside a paragraph. It is not difficult to understand that tables can also be easily included with the \texttt{tabwindow} environment When a paragraph ends, like here, and the window is not yet finished it just ci just continues the past the paragraph boundary, right into the next one(s).
\end{window}

Some characters below the paragraph.

\end{document}