Fertile land, the growth of pastoralism, and the development of refrigerated shipping (of which more in later entries) made Oamaru a wealthy town in the Victorian era. The easy-to-work limestone found in the area was made into beautiful buildings, many of which still survive and are well-cared for. The people of Oamaru value their heritage.
The Opera House is more recent than some of the other buildings, dating from 1907:

What a gorgeous confection to find in a town of about 12,000 people! And it's well-used. On Saturday night we went to a fine performance of Gilbert and Sullivan's The Gondoliers. Front-row seats in the Circle, inside this gem of a theatre:

(My apologies for the poor lighting in this photo.)
This theatre will make a small appearance in one of my future books. How could I resist?