The pataca is the currency of Macau. It is subdivided into 100 avos, with 10 avos called ho (毫) in Cantonese. The abbreviation MOP$ is commonly used.
Obverse: Estátua da Deusa A-Má (statue of the Goddess A-Má,
Goddess of the Sea)
Reverse: Banco Nacional Ultramarino (BNU) building
Watermark: Lotus flower
The statue of the Goddess A'Ma (commemorating the year 1999 when Macau once again became part of China) is 20 meters high and is visible far out in the South China Sea.
Macau has a currency board system under which the legal tender, Macau pataca (or Macao pataca), is 100 percent backed by foreign exchange reserves, in this case currently the Hong Kong dollar. Moreover, the currency board, Monetary Authority of Macao (AMCM), has a statutory obligation to issue and redeem pataca on demand against the Hong Kong dollar at a fixed exchange rate and without limit.
Many thanks to Elaine H. from Hong Kong.