Question: Where was the Grand Prix car produced that was designed by Porsche 356 between 1933 and 1939?
Context: The A1 Grand Prix car was a vehicle designed to compete in the A1 Grand Prix.  The car was standardised for every team to provide a level playing field for competing nations.  It was designed to reduce the volume of "dirty air", allowing drivers to close in on the car in front, encouraging overtaking.  The bodywork was mainly pre-impregnated carbon fibre composites.  From 2008–09 Ferrari was consulted on the design and manufacture for all A1 Grand Prix cars. The Alfa Romeo 12C or Tipo C was a 12-cylinder Grand Prix car.  The 12C-36 made its debut in Tripoli Grand Prix 1936, and the 12C-37 in Coppa Acerbo 1937.  The 12C-36 was a Tipo C fitted with the new V12 instead of the 3.8 litre straight-eight of the 8C-35.  The 12C-37 was a new car, with a lower chassis and an engine bored and stroked Hartong Motorsports was a touring car racing team that competed in the 1996 and 1997 North American Touring Car Championship.  The team was owned by Bill Hartong, a long-time motorsport enthusiast, who spent many years racing Porsche 356's and Porsche 911's in Sportscar Vintage Racing Association (SVRA), Sports Car Club of America (SCCA), Historic Sportscar Racing HSR, and International Motor Sports Association (IMSA) events in the United States.  This was a privateer team in a series that was dominated by manufacturer backed Honda and Dodge teams.  The BMW 318i was driven by Darren Law. The Porsche 356/1 was the first real Porsche car created by Ferdinand "Ferry" Porsche.  This prototype car was a two-seater open roadster with a mid-mounted, air-cooled flat-4 engine of 1,131 cc displacement that produced 40 hp .  While the body was an original design, most of the mechanicals (including engine and suspension) were derived from the Volkswagen Beetle which Ferry's father, Ferdinand Porsche, had designed. The Alfa Romeo P3, P3 monoposto or Tipo B was a classic Grand Prix car designed by Vittorio Jano, one of the Alfa Romeo 8C models.  The P3 was first genuine single-seat Grand Prix racing car and Alfa Romeo's second monoposto after Tipo A monoposto (1931).  It was based on the earlier successful Alfa Romeo P2.  Taking lessons learned from that car, Jano went back to the drawing board to design a car that could last longer race distances.  The P3 was the first genuine single seater racing car, and was powered by a supercharged eight-cylinder engine.  The car was very light for the period, weighing just over 1,500 lb (680 kg) despite using a cast iron engine block. Alfa Romeo Tipo 316, 316 or 16C-316 Grand prix car was used in Grand Prix seasons 1938 and 1939, when it was driven by Giuseppe Farina and Clemente Biondetti.  The Tipo 316 was one of three Alfa Romeo cars designed for the new rules in 1938, which differed mainly by the engine, the other two were the Alfa Romeo Tipo 308 straight-8 and Alfa Romeo Tipo 312 with a V12 engine.  The car was based on Alfa Romeo 12C-37. The Auto Union Grand Prix racing cars types A to D were developed and built by a specialist racing department of Auto Union's Horch works in Zwickau, Germany, between 1933 and 1939. Bob Drake (December 14, 1919 – April 18, 1990) was an American racecar driver.  He participated in one Formula One Grand Prix, on November 20, 1960.  He scored no championship points.  Drake was the last driver to race the famous Maserati 250F in a Formula One World Championship Grand Prix, the 1960 United States Grand Prix.  The 250F was a 2.5 litre front-engined Grand Prix car that was considered obsolete in 1961 due to new engine rules. The Porsche 356 is an iconic sports car which was first produced by Austrian company Porsche Konstruktionen GesmbH (1948–1949), and then by German company Dr. Ing.  h. c. F. Porsche GmbH (1950–1965).  It was Porsche's first production automobile.  Earlier cars designed by the Austrian company include Cisitalia Grand Prix race car, the Volkswagen Beetle, and Auto Union Grand Prix cars. The 1992 Belgian Grand Prix was a Formula One motor race held at Spa-Francorchamps on 30 August 1992.  It was the twelfth round of the 1992 Formula One season.  The race was won by Benetton's Michael Schumacher, the first of his record 91 Grand Prix wins.  The Benetton B192's win also marks the last F1 win of Grand Prix car with an H-Pattern manual gearbox.  Second and third for Williams drivers Nigel Mansell (who survived a collision with Jean Alesi at the first corner) and Riccardo Patrese secured for the team their first Constructor's title since 1987.
Answer: Zwickau, Germany