\documentclass[a4paper,11pt]{article}
\usepackage[polish]{babel}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}
\usepackage{fourier}
\usepackage{enumitem}
\usepackage{tcolorbox}


\begin{document}

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  leftrule=8pt, rightrule=8pt, sharp corners=all, width=10cm]
\begin{enumerate}[itemsep=0pt]
\item 1903 Maria Skłodowska-Curie -- fizyka
\item 1905 Henryk Sienkiewicz -- literatura
\item 1911 Maria Skłodowska-Curie -- chemia
\item 1924 Władysław Reymont -- literatura
\end{enumerate}
\end{tcolorbox}

\end{document}