1. The Queen Isabel, is not the patron saint of Portugal, is Our Lady of Conception (Vila Viçosa)
2. The gallo not representing portogallo (is for tourist)
3. The patron saint of Portugal is Santo António de Lisboa
4. The first flag of Portugal was equal to the current flag of Finland (blue with a white cross)
5. The symbol which represents Portugal is the Cross of Christ.
6. The Cross of the Order of Christ has been since the time of discovery of the most important national symbols, although its origin is even more remote. The Red Cross of symmetrical stems, with an overlay white cross, was the symbol of the Military Order of Christ, founded by D. Dinis in 1317, following the extinction of the Knights Templar.
Indeed the Cross of Christ, adorned the sails of the caravels that explored the unknown seas and during the reign of King Manuel, due to intense maritime activity, the flag of the Order of Christ was often used as a Portuguese naval flag because it was large order linked to the expansion trips.
http://meioseculodeaprendizagens.blogspot.com/2013/03/a-cruz-da-ordem-de-cristo.html#ixzz3aCNikUhP