Danish pastry is a sweet pastry

Pastry

Pastry is the name given to various kinds of baked products made from ingredients such as flour, sugar, milk, butter, shortening, baking powder and/or eggs. Small cakes, tarts and other sweet baked products are called "pastries."...

 which has become a specialty of Denmark

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

 and neighbouring Scandinavian countries and is popular throughout the industrialized world, although the form it takes can differ significantly from country to country. They are referred to as facturas in some Spanish speaking countries.
Danish pastry is, like the croissant

Croissant

A croissant is a buttery flaky pastry named for its distinctive crescent shape. It is also sometimes called a crescent, from the French word for "crescent". Croissants are made of a leavened variant of puff pastry...

, said to originate from Vienna

Vienna

Vienna is the capital and largest city of the Republic of Austria and one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.723 million , and is by far the largest city in Austria, as well as its cultural, economic, and political centre...

 and is called wienerbrød (ˈʋiːˀnɔˌbʁœːˀð, lit.