diff --git a/server.py b/server.py
index 4e5336f..0d1c64b 100644
--- a/server.py
+++ b/server.py
@@ -673,6 +673,21 @@ def page_smecds():
         return render_template("smecds.htm", type="main", user=session["username"])
 
 
+@app.errorhandler(403)
+def page_403(_):
+    return render_template('403.htm')
+
+
+@app.errorhandler(404)
+def page_404(_):
+    return render_template('404.htm')
+
+
+@app.errorhandler(500)
+def page_500(e):
+    return render_template('500.htm', e=e)
+
+
 if __name__ == "__main__":
     # Se non esiste il database, crealo e inizializzalo!
     if not os.path.isfile("data.db"):
diff --git a/templates/403.htm b/templates/403.htm
new file mode 100644
index 0000000..ebdc556
--- /dev/null
+++ b/templates/403.htm
@@ -0,0 +1,7 @@
+{% extends 'base.htm' %}
+{% block title %}Non autorizzato • estus{% endblock %}
+{% block content %}
+    <div class="alert alert-danger" role="alert">
+        <b>403 Forbidden:</b> Devi eseguire il login per poter visualizzare questa pagina.
+    </div>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/404.htm b/templates/404.htm
new file mode 100644
index 0000000..be712b9
--- /dev/null
+++ b/templates/404.htm
@@ -0,0 +1,7 @@
+{% extends 'base.htm' %}
+{% block title %}Non trovato • estus{% endblock %}
+{% block content %}
+    <div class="alert alert-danger" role="alert">
+        <b>404 Not Found:</b> La pagina che stavi cercando non è stata trovata.
+    </div>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/500.htm b/templates/500.htm
new file mode 100644
index 0000000..55f301d
--- /dev/null
+++ b/templates/500.htm
@@ -0,0 +1,13 @@
+{% extends 'base.htm' %}
+{% block title %}Errore server • estus{% endblock %}
+{% block content %}
+    <div class="alert alert-danger" role="alert">
+        <b>500 Internal Server Error:</b> Qualcosa non ha funzionato nel server, e il debug non è attivo.
+    </div>
+    <div>
+        Ecco una piccola descrizione dell'errore...
+    </div>
+    <code>
+        {{ e }}
+    </code>
+{% endblock %}
\ No newline at end of file
diff --git a/templates/nav.htm b/templates/nav.htm
index 359eaa0..d1c0666 100644
--- a/templates/nav.htm
+++ b/templates/nav.htm
@@ -22,6 +22,6 @@
                 </li>
                 <a href="/login" class="btn btn-danger navbar-btn btn-right">Logout</a>
             </ul>
-      {% endif %}
+        {% endif %}
     </div>
 </nav>