Focus on Santa Cristina al Tiverone Altarpiece and explain the abstract.
Santa Cristina al Tiverone Altarpiece  is an oil-on-panel painting by the Italian Renaissance painter Lorenzo Lotto, executed around 1504–1506. It is still housed in its original location, the parish church of Santa Cristina in Quinto di Treviso, a frazione of Treviso, northern Italy. 
Measuring 90x179 cm (lunette) and 177x162 cm (central panel), it is signed "Laurentius / Lotus / P.[inxit]" at the base of the throne. It was perhaps commissioned around 1505 by bishop Bernardo de' Rossi, in whose court Lotto worked at the time. It was released on 14 May 1507, just before the artist's move to Recanati.
Bernardo de' Rossi Treviso frazione Italy Lorenzo Lotto Recanati lunette