how to put the logo of my institution on each page of my thesis?

Question

I am writing my thesis on a Latex environment and especially in a document of type book. Here are the first lines:

\documentclass[a4paper,12pt,two side]{book}
\usepackage[utf8]{inputenc}
\usepackage[greek]{babel}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{thmtools, thm-restate}
\usepackage{fancyhdr}
\usepackage{lipsum}
\pagestyle{fancy}
\fancyhf{}
\fancyhead[LE,RO]{Το Θεώρημα Μοναδικότητας\textlatin{Alexandrov}, Δημήτριος Στεργίου}
\fancyhead[RE,LO]{ςςςςςςςς}
\fancyfoot[CE,CO]{\leftmark}
\fancyfoot[LE,RO]{\thepage}
\graphicspath{{images/}}
\title{Διπλωματική Εργασία}
\author{Δημήτρης Στεργίου}
\date{Σεπτέμβριος 2021}
\begin{document}
\maketitle
\chapter{Εισαγωγικές Έννοιες}

Nevertheless I would like to put the logo of my University on the left top of each page of the book. I have put the image in a appropriate folder named images but I do not know what to do next ....

Thanks for any help.