Traditionally Olympiakos was supported by residents of the inner old part of Nicosia within the Venetian Walls, the attendance at home games peaked in the late 1960s and early 1970s when fans from all over Cyprus would attend Olympiakos home games at the old GSP stadium filling it to its 12,000 capacity, especially when the club participated three times in the Greek First Division. After 1977 when the club won its last major title, the fanbase started to shrink. From a position where it could rival the other two Nicosia clubs, the fanbase dwindled for two reasons. Firstly outward migration from the Nicosia city centre to the suburbs after 1974 meant that the neighbourhoods of traditional Olympiakos supporters were becoming less populated, despite this trend the club made a conscious decision to leave the new clubhouse on the "green line" dividing Nicosia. Also the Turkish invasion spelt economic problems for the club and the fact that it was located in an inner city area next to the green line only made things harder. Up until the late 1990s many traditional Olympiakos supporters out of frustration for the lack of titles either stopped going to games and others switched allegiances to other Nicosia clubs that were richer and could still afford to win titles such as APOEL. It could be said that the club did not transition well from the era of amateur to semi-professional football in Cyprus beginning in the early 1980s mainly for the reasons mentioned above. Also the younger generation of Cypriots did not grow up with Olympiakos as a major power in the Cyprus league and despite their parents supporting Olympiakos they would often choose to support another side that won titles in the 1980 to 2000 years.