There have been numerous international copyright conventions some of which include;
Universal Copyright Convention at Geneva in 1952.
Universal Copyright Convention as revised at Paris on 24th July 1971.
Berne Convention for the Protection of Literary and Artistic Works, Paris Act of 24th July 1971 as amended on September 28th 1979.
[Note: The first Berne Convention was on September 9th 1886]
WIPO World Intellectual Property Organization Diplomatic Conference Geneva, December 2 to 20, 1996
WIPO Copyright Treaty of December 20th 1996
WIPO Performances and Phonograms Treaty of December 20th 1996
The World Trade Organization Agreement on Trade Related Aspects of Intellectual Property Rights, Final Act Marrakech on 15th April 1994.