Czech Republic–Slovakia relations
Before 1918, both countries were part of Austria–Hungary. However, after the Ausgleich of 1867 Czechia belonged to the Austrian Empire while Slovakia belonged to the administratively separate Kingdom of Hungary, and between 1918 and December 31, 1992, both countries were part of Czechoslovakia. 
Both countries established diplomatic relations on January 1, 1993. These international relations are usually referred to or described as "very good", "cordial", and "above standard" in the media. When a Czech or Slovak president is inaugurated, very often his first international visit is to the former part of the common country. The same custom applies to newly elected prime ministers of the Czech Republic and Slovakia.
Cinema of Slovakia
Given that in the periods from the invention of film in 1896 to 1938 and from 1945 to 1992 Slovakia did not exist as an independent country, there has been some controversy over the naming of certain films as specifically either Slovak or Czech. Although the Czech and Slovak halves of Czechoslovakia each had separate languages, they were close enough for film talent to move freely between the two republics. As a result, during the Czechoslovak period — and even after it — a number of Slovak directors made Czech-language films in Prague, including Juraj Herz and Juraj Jakubisko.