\documentclass{article}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[frenchb]{babel}
\usepackage{lmodern,oldstyle,graphicx,niceframe,myniceframe,calligra}
\usepackage[a4paper,landscape,margin=.6cm]{geometry}
\pagestyle{empty}

\def\millier#1{\mil=#1\relax}
\def\nom#1{\def\NOM{#1}}
\newcount\mil
\def\decimales#1{\def\DEC{#1}}
\def\x#1{\textos{#1}\hskip0mm}

\newbox\fili
\setbox\fili=\hbox{\includegraphics[width=15cm]{filigrane_dc}}

\begin{document}


%%% Informatios modifiables
%%% Chaine de test de trad: Lang EN
% Le numéro du millier 1 pour la plage 1.001 -> 2.000
\millier{%%MILLIER%%}

% Le nom du lauréant
\nom{%%NOM%%}

% Les milles décimales, en 10 lignes de 100
\decimales{%
%%DECIMALES%%}


\renewcommand\rmdefault{ppl}\rmfamily

\frameb{
\begin{center}
{\calligra\fontsize{55}{60}\selectfont
La Quadrature du N{\hskip -12pt}et~}

\vskip 3mm

\strut\copy\fili
\vskip -\ht\fili
\vskip -\dp\fili

\vskip 1cm

\begin{minipage}{25cm}\LARGE\itshape\centering
thanks for his/her support\par
\begin{center}\fontsize{30}{36}\selectfont
\textbf{\textup{\NOM}}\par
\end{center}
\vskip 1mm
and awards him/her the digits \textos{\the\mil}\textos{001}\advance\mil by 1\ to \textos{\the\mil}\textos{000} of $\pi$\end{minipage}

\vskip 1cm

\begin{minipage}{23cm}
\hspace*{4mm}{\huge 3}.\textos{141592653589793238462643383279502884197169399375105820974944592}...
\vskip 2mm
\framet{\centering%
\vskip 5mm
\begin{minipage}{21cm}\centering\large\baselineskip=16pt

\strut\llap{...}\DEC\rlap{...}
\end{minipage}
\vskip 5mm
}
\end{minipage}

\end{center}

\vskip .5cm

\hbox to 27cm{\hfil\footnotesize\itshape
    La Quadrature du Net is an organization defending fundamental rights and freedoms in the digital environment. It only exists thanks to your support. Thank you. \hskip 5mm
  \includegraphics[width=.9cm]{sortie}}

}

\end{document}