You can read the whole story here: https://www.stirling.gov.uk/news/2020/february-2020/700-year-old-medieval-friar-to-be-reburied-in-shadow-of-stirling-castle/
Also known as the Order of Preachers, the Dominicans wear a black and white habit:
which is reflected in their coat of arms. Originally Sable, a pile inverted argent, indeed in the arms of the first Dominican Pope, Benedict XI, the arms are even simpler - Per pale Sable and Argent - nowadays the friars use Gyronny sable and argent, a cross flory counter-changed.
Carrick Pursuivant has sent me this version of the Dominican arms displayed in the Palace of the Inquisator at Birgu Valletta, Malta.