It’s called “Weihnachtsmarkt” in Berlin. In Vienna, it’s “Christkindlmarkt”. In English-speaking countries, we call it “Christmas Market”.
Christmas markets–open air festivals held during the weeks leading up to Christmas, offering music, decorations, toys, gifts, and some amazing food–originated in German-speaking central Europe, and date back to at least the 14th Century. You can find them in many cities, but today they’re most prominent in Germany, Austria, and Eastern Europe.
Some cities, like Budapest and Munich, have one big Christmas Market. Others, like Berlin and Vienna, have several, spread throughout the town.
Here are some images from the Weihnachtsmarkt in the Charlottenburg area in Berlin:
This was irresistible–planked salmon over an open fire.