was responsible for the organization of Expo 67. The race circuit is on Notre Dame Island, a man-made island in the St. Lawrence River most of which was originally built up for the Expo in 1967. Saint Helen's Island to the northwest was artificially enlarged for the Expo '67 fairgrounds and a prominent remnant of the fair, the Biosphere can be regularly seen during television coverage of racing events. Almost half of the track – from the hairpin turn until after the pit area – runs alongside the Olympic Basin, a huge rectangular basin which was created for the rowing and canoeing events of Montréal's 1976 Summer Olympics. Over the winter of 2018-19 the paddock was torn down and completely rebuilt before the Grand Prix. The old paddock had been in use since 1988. Circuit layout Barriers run close to the circuit and many experienced drivers have been caught out by them. A particularly famous part of the circuit is the wall on the outside of the exit of the final chicane before the start/finish straight. In 1999 the wall, which bears the name Bienvenue au Québec ("Welcome to Quebec") giving it the nickname "Mur du Québec" (Quebec Wall), ended the race of three Formula One World Champions, Damon Hill, Michael Schumacher and Jacques Villeneuve along with FIA GT champion Ricardo Zonta. Since then the wall has been nicknamed "The Wall of Champions". In subsequent years, 2009 world champion Jenson Button (2005) and four time World Champion Sebastian Vettel (2011, during free practice) also became victims of the wall. For the first few years of its existence, the track consisted of technical, medium speed chicanes and a relatively low overall lap speed. However, over the years the circuit has transformed into a power track, with straight line speed being very much a priority. Between 1986 and 1988 (with a one-year hiatus occurring in 1987), the pitlane and start-finish straight were relocated from the hairpin to the exit of the fast right-left chicane, which became the final corner. After the fatal crashes of Roland Ratzenberger and Ayrton Senna at Imola earlier in the year, in 1994 a chicane was inserted between the Casino corner and the hairpin to decrease top speed. The 1996 race saw both the chicane and the Casino corner removed and the layout changed; the run from the hairpin at the bottom of the circuit was turned into