The grand master of San Francisco chocolate was Domenico Ghirardelli, who was born near Genoa, Italy, in 1817. His family imported exotic foods, and at a young age he started apprenticing with a candy maker (how do we get that job?). By his 20s he took off for South America to start his own chocolate business. In Peru he started a confectionery store next to a cabinet shop owned by American James Lick (yes, that one).

BFFs Domingo Ghirardelli and James Lick, via SAN FRANCISCO HISTORY CENTER, SAN FRANCISCO PUBLIC LIBRARY.

Lick decided to relocate to the burgeoning San Francisco, and arrived days before gold was discovered at Sutter's Mill. Luckily for Ghirardelli, his buddybrought 600 pounds of chocolate with him. Ghirardelli, who at this point had changed his first name to the Spanish version, Domingo, decided to try his luck at gold prospecting and came to California, too. Turns out he was better at chocolate than at mining, and he opened a shop out of a tent in Stockton for the miners. Eventually he opened a general store in Hornitos, and it became such a hit that he opened one in San Francisco on the corner of Broadway and Battery.

Ruins of 1852 Ghirardelli & Co. store in Hornitos, via Ghost Town Explorers.

Fires hit both towns within three days of each other and destroyed both of Ghirardelli's shops. He bounced back quickly, opening a coffee shop, and later a confectionary and spice company at Kearny and Washington. The business changed names a few times, relocated to Jackson and Mason, and re-relocated to the corner of Greenwich and Powell.

Jackson Street office in 1882, via Bancroft Library.

Domingo moved the family to Oakland and built one of the town's first big houses with grounds that took up a square block. It had a large garden with marble fountains and statuary from Italy. The place was sold at auction in 1874 when the company went into bankruptcy during a recession.

Domingo's house in Oakland, via Bancroft Library.

By 1893, Domingo retired and left his business to three sons, who decided to purchase the Pioneer Woolen Mill building in today's Fisherman's Wharf for manufacturing.

Pioneer Woolen Mills in 1868, via SAN FRANCISCO HISTORY CENTER, SAN FRANCISCO PUBLIC LIBRARY.

Over the next few decades the company built a few more buildings, including its own power plant and employee housing, to round out the complex. That 15-foot-high, illuminated Ghirardelli mega-sign was added in 1923.

The company was so influential that there was even a Ghirardelli Building at the1915 World's Fair designed by Bakewell & Brown.

The company was sold in the 1960s (but kept its name, obviously), and the complex became one of the first examples of adaptive reuse in the country. The new owner, William Matson Roth, hired midcentury starchitects Wurster, Bernardi & Emmons to modernize the complex into a specialty shopping center. Ghirardelli Square reopened as a festival marketplace on November 29, 1964. The complex was declared a city landmark only a year later, and is still a major tourist draw.

The chocolatier is now owned by Swiss company Lindt and Sprungli Chocolate (of tiny chocolate ball fame), and Domingo Ghirardelli was inducted into theCandy Hall of Fame in 2012.