by whom was it painted?
Rogier van der Weyden.
Virgin and Child Enthroned
The Virgin and Child Enthroned (also known as the Thyssen Madonna) is a small oil-on-oak panel painting dated 1433, usually attributed to the Early Netherlandish artist Rogier van der Weyden. 
what is virgin and child enthroned? Small oil-on-oak panel painting
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Virgin and Child Enthroned [SEP] Introduction
The Virgin and Child Enthroned (also known as the Thyssen Madonna) is a small oil-on-oak panel painting dated 1433, usually attributed to the Early Netherlandish artist Rogier van der Weyden. It is closely related to his "Madonna Standing", completed during the same period. The panel is filled with Christian iconography, including representations of prophets, the Annunciation, Christ's infancy and resurrection, and Mary's Coronation. It is generally accepted as the earliest extant work by van der Weyden, one of three works attributed to him of the Virgin and Child enclosed in a niche on an exterior wall of a Gothic church.