Passage: With the prospect of reviving the Olympic games very much in doubt, Coubertin and Vikelas commenced a campaign to keep the Olympic movement alive. Their efforts culminated on 7 January 1895 when Vikelas announced that crown prince Constantine would assume the presidency of the organising committee. His first responsibility was to raise the funds necessary to host the Games. He relied on the patriotism of the Greek people to motivate them to provide the required finances. Constantine's enthusiasm sparked a wave of contributions from the Greek public. This grassroots effort raised 330,000 drachmas. A special set of postage stamps were commissioned; the sale of which raised 400,000 drachmas. Ticket sales added 200,000 drachmas. At the request of Constantine, businessman George Averoff agreed to pay for the restoration of the Panathenaic Stadium. Averoff would donate 920,000 drachmas to this project. As a tribute to his generosity, a statue of Averoff was constructed and unveiled on 5 April 1896 outside the stadium. It stands there to this day.Some of the athletes would take part in the Games because they happened to be in Athens at the time the Games were held, either on holiday or for work (e.g., some of the British competitors worked for the British embassy). A designated Olympic Village for the athletes did not appear until the 1932 Summer Olympics. Consequently, the athletes had to provide their own lodging.

Question: Who was partially responsible for convincing Constantine to support the Olympic games?
Coubertin and Vikelas