Starting a paragraph with a big letter

Question

I want to type my thesis with this style. How can I do this in latex?

Answer 1

With the lettrine package and some enhancements.

MWE:

\documentclass{article}
\usepackage{lettrine}

\begin{document}
\lettrine[findent=2pt]{\fbox{\textbf{T}}}{ }his thesis deals with some aspects of the Hamiltonian 
formulation of quantum field theory, in particular light-front Hamiltonian field theory. 
Light-front Hamiltonian field theory\dots
\end{document} 

Answer 2

You can use the lettrine package. Here is a very basic example:

\documentclass[12pt,a4paper]{article}
\usepackage{lettrine}
\begin{document}
\lettrine{O}{nce} upon a time
\end{document}

I'm not familiar with this package, but its documentation shows many possibilities of customization.