sentences:  The twelve main panels of the altarpiece are in the National Gallery, London, but the predella showing scenes from the life of Saint Peter has been dispersed.The two painters again collaborated in 1372–73 on the large panel of the Coronation of the Virgin commissioned by the mint of Florence, and in 1386 they received the commission for a fresco of the Annunciation for the council chamber in the Palazzo dei Priori, Volterra.Between 1378 and 1380 Jacopo worked in the Florence Cathedral – he is recorded as Matteo guarantor – and continued to procure marble for the cathedral workshop after his brother's death.