The Guitolão is a twelve-stringed musical instrument

Musical instrument

A musical instrument is a device created or adapted for the purpose of making musical sounds. In principle, any object that produces sound can serve as a musical instrument—it is through purpose that the object becomes a musical instrument. The history of musical instruments dates back to the...

 created by Gilberto Grácio

Gilberto Grácio

Gilberto Grácio is a famous Portuguese guitar maker, born in Lisbon on 12 May 1936. He is the son of João Pedro Grácio Junior and the grandson of João Pedro Grácio, both renowned luthiers...

. It was first presented to the public on the 18th of June 2005. Only two models were built.
According to António Eustáquio, the owner of one of the guitars, it is not suitable for fado

Fado

Fado is a music genre which can be traced to the 1820s in Portugal, but probably with much earlier origins. Fado historian and scholar, Rui Vieira Nery, states that "the only reliable information on the history of Fado was orally transmitted and goes back to the 1820s and 1830s at best...

. It has a wider timbric range than a typical Portuguese guitar

Portuguese guitar

The Portuguese guitar or Portuguese guitarra is a plucked string instrument with twelve steel strings, strung in six courses comprising two strings each. It is one of the few musical instruments to use Preston tuners. It is most notably associated with fado.-History:The origin of the Portuguese...

.

The soundboard (top) is made of spruce, the body sides and back are Pau Santo (similar to rosewood), the fretboard is made of ebony and the neck of mahogany.

Tuning

Its tuning is (from High to Low)

Mi3/Mi3 Re3/Re3 La2/La2 Mi2/Mi2 Re3/Re2 Sol2/Sol1