Euroswapper

Update.
Removed completed swaps:

Andorra:
2021 - Meritxell
2022 - both

Belgium 2025 Spa

Croatia 2025 Pula Arena

Italy 2004 World Food Programme

Luxembourg:
2006 Grand-Duke Guillaume, heir to the throne
2010 Coat of arms of the Grand Duke
2022 Erasmus

Portugal:
2007 Portuguese Presidency of the EU
2009 2nd Lusophone Games

Slovenia:
2008 Primož Trubar
2011 Franc Rozman-Stane
2013 Postojna Cave
2015 Emona-Ljubljana
2017 The 10th anniversary of the euro in Slovenia

Thank you @Aussiedollar

Update.
Removed completed swaps:

Italy:
2016 Donatello
2017 Titus Livius
2018 Coming into Force of the Italian Constitution
2018 Italian Ministry of Health
2019 Leonardo da Vinci
2021 Rome