12pt Palatino and a selection of packages

\documentclass{article}

% ams stuff
\usepackage{amssymb}
\usepackage{amsmath}
% theorems
\usepackage{thmtools}
% graphics
\usepackage{graphicx}

% numbering
\usepackage{enumitem}

% ordered list with 'legal' (i.e. 1.2.3.1 style) numbering 
\newlist{oll}{enumerate}{10} 
\setlist[oll]{label*=\arabic*.}

\usepackage{fontspec}
\usepackage{mathpazo}
\setmainfont
     [ BoldFont       = texgyrepagella-bold.otf ,
       ItalicFont     = texgyrepagella-italic.otf ,
       BoldItalicFont = texgyrepagella-bolditalic.otf ]
     {texgyrepagella-regular.otf}
\author{Bob The Random Turnip}
\date{Once Upon A Time}
\title{Cindarella and Little Red Riding Hood take on the Tree Bears}
\begin{document}
%\maketitle
\end{document}