Once again many thanks to Robert Brnka for this lovely cover posted from Slovakia!
The cute lamb stamp was issued on 4th March 2011 to commemorate Easter, the most important Christian festival.
Just like the blood of lamb of God saved the old Israelites in ancient Egypt from ten plagues of God, the death of Jesus Christ saved all Christians from external damnation. Therefore, the lamb became a symbol not only of Jesus Christ, but also of the Easter.
The se-tenant stamps affixed on the top right were issued on 25th March 2011 to mark the Ice Hockey World Champions.
This cover was postmarked on 26th July 2011 in Bratislava and took a week to reach me.