Registered cover and mint stamps from Croatia

I received a registered cover from Croatia, with beautiful mini sheet Bridges and viaducts, issued on 27.04.2017. On upper stamp is Kosinj Bridge and on lower is Limska Draga Viaduct.

Inside cover was this 3 stamp sets and one mini sheet:
WWF - Euroasian Griffon, issued on 23.01.2017.
Croatian Fauna - Bats, issued on 21.03.2017.
EUROPA Stamps - Palaces and Castles, issued on 09.05.2017.
The 300th Anniversary of the Birth of Maria Theresa, 1717-1780 - Joint Issue with Austria, Hungary, Slovenia & Ukraine , issued on 13.05.2017.


Thank you Tomislav!