The draw for the preliminary round took place in UEFA headquarters
in Paris on
29 June 1956. The
21 challengers of Real Madrid were grouped geographically into
three pots. The first four teams drawn in each pot would play
the preliminary round in September, while the remaining three
clubs received byes.
The calendar was decided by the involved teams, with all matches
to be played by 1 October.
Dortmund beat Spora Luxembourg 70 in a play-off to qualify for
the first round.