Orcagna (13291389)

Orcagna, a Florentine painter, sculptor, and architect, did several frescoes; was architect of the cathedral of Orviëto; his masterpiece an absolutely unique marble tabernacle in the church of Or San Michele, Florence (13291389).

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Oratory, Congregation of the * Orchardson, William Quiller
Oporto
Opportunist
Optimism
Opus Operatum
Oran
Orange River
Orange River Colony
Orangemen
Oratorio
Oratory, Congregation of the
Orcagna
Orchardson, William Quiller
Orcus
Ordeal
Ordericus Vitalis
Orders in Council
Oreades
Oregon
Orelli, Conrad von
Orelli, Johann Kaspar von
Orestes