However, they are quite similar in that all contain old Portuguese royal mints and seals within a circle of seven castles and five escutcheon with silver bezants (all similar to what can be seen in the Coat of arms and Flag of Portugal) and the word "Portugal".
Also featured in the designs, all done by Vitor Manuel Fernandes dos Santos, are the 12 stars of the EU and the year of minting.
Portugal Euro Coins
€ 0.01
Observe: The royal seal of 1134
Observe: The royal seal of 1134
€ 0.02
Observe: The royal seal of 1134
Observe: The royal seal of 1134
€ 0.05
Observe: The royal seal of 1134
Observe: The royal seal of 1134
€ 0.10
Observe: The royal seal of 1142
Observe: The royal seal of 1142
€ 0.20
Observe: The royal seal of 1142
Observe: The royal seal of 1142
€ 0.50
Observe: The royal seal of 1142
Observe: The royal seal of 1142
€ 1
Observe: The royal seal of 1144
Observe: The royal seal of 1144
€ 2
Edge: The edge lettering features the words
Observe: The royal seal of 1144
Edge: The edge lettering features the words
Observe: The royal seal of 1144
€ 2 Commemorative Coins
€ 2
Observe: Presidency of the Council of the European Union
Year: 2007
Observe: Presidency of the Council of the European Union
Year: 2007
€ 2
Observe: 60th Anniversary of the Universal Declaration of Human Rights
Year: 2008
Observe: 60th Anniversary of the Universal Declaration of Human Rights
Year: 2008
€ 2
Observe: 2009 Lusophony Games
Year: 2009
Observe: 2009 Lusophony Games
Year: 2009
€ 2
Observe: 100th anniversary of Republic Portugal
Year: 2010
Observe: 100th anniversary of Republic Portugal
Year: 2010
€ 2
Observe: 500th annivesary of the birth of Fernão Mendes Pinto
Year: 2011
Observe: 500th annivesary of the birth of Fernão Mendes Pinto
Year: 2011
€ 2
Observe: Guimarães - Capital Europeia da Cultura em 2012
Year: 2012
Observe: Guimarães - Capital Europeia da Cultura em 2012
Year: 2012
€ 2
Observe: 250 Years of the Torre dos Clérigos
Year: 2013
Observe: 250 Years of the Torre dos Clérigos
Year: 2013
€ 2
Observe: 40th Anniversary of the Carnation Revolution
Year: 2014
Observe: 40th Anniversary of the Carnation Revolution
Year: 2014
€ 2
Observe: International Year of Family Farming
Year: 2014
Observe: International Year of Family Farming
Year: 2014
€ 2
Observe: 150 Years of Red Cross in Portugal
Year: 2015
Observe: 150 Years of Red Cross in Portugal
Year: 2015
€ 2
Observe: 500 Years of Portugiesisch-Timor
Year: 2015
Observe: 500 Years of Portugiesisch-Timor
Year: 2015
€ 2
Observe: Olympic Games - Rio 2016
Year: 2016
Observe: Olympic Games - Rio 2016
Year: 2016
€ 2
Observe: 50 years of the first bridge uniting the two riverbanks of the Tejo River
Year: 2016
Observe: 50 years of the first bridge uniting the two riverbanks of the Tejo River
Year: 2016
€ 2
Observe: 150 years of the birth of writer Raul Brandão
Year: 2017
Observe: 150 years of the birth of writer Raul Brandão
Year: 2017
€ 2
Observe: 150 Years of Public Security
Year: 2017
Observe: 150 Years of Public Security
Year: 2017
€ 2
Observe: 250 years of the Ajuda Botanical Garden (‘Jardim Botânico da Ajuda’)
Year: 2018
Observe: 250 years of the Ajuda Botanical Garden (‘Jardim Botânico da Ajuda’)
Year: 2018
€ 2
Observe: 250 years of the Official Printing Works (‘Imprensa Nacional’)
Year: 2018
Observe: 250 years of the Official Printing Works (‘Imprensa Nacional’)
Year: 2018
€ 2
Observe: 500 years of the first circumnavigation organised and led by the Portuguese explorer and navigator Fernão De Magalhães
Year: 2019
Observe: 500 years of the first circumnavigation organised and led by the Portuguese explorer and navigator Fernão De Magalhães
Year: 2019
€ 2
Observe: 600 years of the discovery of the Madeira Archipelago, by the Portuguese navigators Bartolomeu Perestrelo and Tristão Vaz
Year: 2019
Observe: 600 years of the discovery of the Madeira Archipelago, by the Portuguese navigators Bartolomeu Perestrelo and Tristão Vaz
Year: 2019
Source: European Central Bank and Wikipedia