São João da Madeira - Wikipedia
São João da Madeira (Portuguese pronunciation: [sɐ̃w ʒuˈɐ̃w ðɐ mɐˈðɐjɾɐ] ()), is a city and a municipality in northwestern region of the Portuguese Norte region. It's part of the larger Porto Metropolitan Area, located 30 km from central Porto.The population in 2011 was 21,713. With an area of 7.94 km², it is the smallest municipality in Portugal.