Of Munich's original four outer gates that gave entrance to the city during the Middle Ages, only three remain: the Karlstor, Isartor and Sendlinger Tor.The Karlstor was originally known as the Neuhauser Tor but was renamed in 1797 after Karl Theodor. The Elector created a new square near the Karlstor, officially known as Karlsplatz but still often referred to as Stachus. The gate was integrated into the plans for the new square by adding wings to each side of the gate, creating a semi-circular square.The Karlstor originally had three towers, but the tallest, central tower was destroyed in 1857 when the gunpowder that was stored in the tower exploded. The two side towers were renovated in 1861 after a neo-gothic design by the Italian architect Domenico Zanetti.