The Viola Beiroa is a stringed musical instrument from Castelo Branco, Eastern Portugal. It has 12 strings in 7 courses. The strings are made of steel. It is tuned D3, D3, A3 A2, D3 D2, G3 G2, B3 B3, D3 D3. The scale length is about 520mm. External links The Stringed Instrument Database ATLAS of Plucked Instruments String instruments Portuguese musical instruments pt:Violas portuguesas#Viola beiroa