 Complete the following phrase:  The neoclassical Brienner Straße in Munich is one of four royal avenues next to the Ludwigstraße, the Maximilianstraße and the Prinzregentenstraße. The boulevard was constructed from 1812 onwards, during the reigns of Maximilian I Joseph of Bavaria and his successor Ludwig I, in accordance with a plan by Karl von Fischer and Friedrich Ludwig von Sckell. The avenue is named after the 