This relief of coat of arms is on the façade of Palácio do Conde de Amarante / Edifício do Governo Civil de Vila Real
"Quinas
Quina (plural quinas) is the Portuguese word for quincunx.
After the official recognition of the Kingdom of Portugal as an independent country in 1143 (it had been self declared as so in 1139), silver bezants were added to the blue cross of the shield, symbolising coins and the right of the monarch to issue currency, as leader of a sovereign state. Eventually, and given the enormous dynamism of medieval heraldry, it is believed that the shield degraded and lost some elements in battle, eventually losing the cross format. This is how King Sancho I inherited the shield from his father, Afonso Henriques, with the cross replaced by escutcheons with the silver bezants. A traditional legend explains that these escutcheons represent the five moor kings defeated by King Afonso I of Portugal in the battle of Ourique.
The number of silver bezants in each escutcheon varied extensively, with versions having represented from four up to eleven. In the late 14th century however, the number of bezants was fixed in five. Late explanations interpret them as the five wounds of Jesus Christ and/or the thirty pieces of silver (with the five bezants in the middle escutcheon counted twice), although this is highly improbable.
From the fixation of the number of bezants in five, the groups of the five escutcheons, each with five bezants of the Portuguese shield became popularly referred as quinas. By synecdoche, the term "Quinas" came to be used as an alternative designation of the coat of arms of Portugal and came even be used as a reference to anything that represents Portugal (e.g. the Flag of Portugal being often referred as the "Flag of the Quinas").
Castles
It was during the reign of Afonso III that the red bordure with golden castles (not towers, as some sources state) was added. Although the number of castles could vary between eight and twelve, Afonso IV would define them as twelve, and Sebastian I would finally fix them as seven. They supposedly represent the Moorish castles conquered by the Kingdom of Portugal during the Reconquista. Their origin is probably Castilian, but unlike Spanish castles, which usually have their gates coloured blue (hence opened), Portuguese castles were usually depicted with gold gates (hence closed). As a matter of fact, Afonso III was the second son of King Afonso II of Portugal and thus was not expected to inherit the throne, which was destined to go to his elder brother King Sancho II of Portugal. As a second son, the coat of arms of Afonso III included both the arms of his father and the arms of his mother Urraca of Castile, thus the Castillan red border with golden castillan castles, around the Portuguese shield inherited from his father."
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This coat is for hundred years because in 1910 the monarchy finishes in Portugal and began the Republic. This coat has a crown of that years.
Here it has french format topped by a closed crown and surrounded by quite prominent phytomorphic motifs; the gable of the pediment is crowned by an acroterium, wreath and other elements.