the early Middle Ages, the palas was usually that part of an imperial palace (or Kaiserpfalz), that housed the Great Hall, where affairs of state were conducted; it continued to be used as the seat of government in some German cities. In the Holy Roman Empire the powerful independent Electors came to be housed in palaces (Paläste). This has been used as evidence that power was widely distributed in the Empire; as in more centralized monarchies, only the monarch's residence would be a palace. In modern times, the term has been applied by archaeologists and historians to large structures that housed combined ruler, court and bureaucracy in "palace cultures". In informal usage, the term "palace" can be extended to a grand residence of any kind. Ancient palaces Early ancient palaces include the Assyrian palaces at Nimrud and Nineveh, the Minoan palace at Knossos, and the Persian palaces at Persepolis and Susa. Palaces in East Asia, such as the imperial palaces of Japan, Korea, Vietnam, Thailand, Indonesia, and large wooden structures in China's Forbidden City, consist of many low pavilions surrounded by vast, walled gardens, in contrast to the single building palaces of Medieval Western Europe. Palaces were also built by post-classical African kingdoms such as the Ashanti Empire. Before its destruction during the Third Anglo-Ashanti War, the Ashanti royal palace at Kumasi, Ghana was described by English explorers Thomas Edward Bowdich and Winwood Reade as "an immense building of a variety of oblong courts and regular squares". Medieval palaces Islamic Lands Americas Brazil The Brazilian new capital, Brasília, hosts modern palaces, most designed by the city's architect Oscar Niemeyer. The Alvorada Palace is the official residence of Brazil's president. The Planalto Palace is the official workplace. The Jaburu Palace is the official residence of Brazil's vice-president. Also Rio de Janeiro, the former capital of the Portuguese Empire and the Empire of Brazil, houses numerous royal and imperial palaces as the Imperial Palace of São Cristóvão, former official residence of the Brazil's Emperors, the Paço Imperial, its official workplace and the Guanabara Palace, former residence of Isabel, Princess Imperial of Brazil besides palaces of the nobility and aristocracy. The city of Petropolis, in the state of Rio de Janeiro, is particularly known for its palaces of the imperial period such as the Petrópolis Palace and the Grão-Pará Palace. Canada In Canada, Government House is a title given to the official residences