Latin pronunciation, both in the classical and post-classical age, has varied across different regions and different eras. As the respective languages have undergone sound changes, the changes have often applied to the pronunciation of Latin as well.
Latin still in use today is more often pronounced according to context, rather than geography. For a century, ecclesiastical Latin, that is Latin with an Italianate pronunciation, has been the official pronunciation of the Catholic Church due to the centrality of Italy and Italian, and this is the default of many singers and choirs. In the interest of historically informed performance, some singers of Medieval, Renaissance and Baroque music adopt the pronunciation of the composer's period and region. While in Western university classics departments the reconstructed classical pronunciation has been general since around 1945, in the Anglo-American legal professions the older style of academic Latin still survives.
