A Pastel de Nata (Portuguese pronunciation: [pɐʃˈtɛɫ dɨ ˈnatɐ]; plural: Pastéis de Nata), is a Portuguese egg tart pastry, common in Portugal, the Lusosphere countries and regions (which include Brazil, Angola, Mozambique, Cape Verde, São Tomé and Príncipe, Guinea-Bissau, Timor-Leste, Goa, and Macau, introducing them later in Mainland China), and countries with significant Portuguese immigrant populations, such as Canada, Australia, Luxembourg, the United States, and France, among others.

It is believed that pastéis de nata were created before the 18th century by Catholic monks at the Jerónimos Monastery (Portuguese: Mosteiro dos Jerónimos) in the civil parish of Santa Maria de Belém, in Lisbon: for this reason, they are alternately known as Pastéis de Belém (sin.: Pastel de Belém). During Portuguese medieval history, the convents and monasteries of Portugal produced large quantities of eggs, whose egg-whites were in demand for starching of clothes (such as nuns' habits) and also in wineries (where the were used in the clearing of wines, such as Porto). It was quite common for these Portuguese monasteries and convents to produce many confections with the leftover egg yolks, resulting in a proliferation of sweet pastry recipes throughout the country.

Belém (literally "Bethlehem") is a Brazilian city, the capital and largest city of state of Pará, in the country's north region. It is the entrance gate to the Amazon with a busy port, airport and bus/coach station. Belém lies approximately 100 km upriver from the Atlantic Ocean, on the Pará River, which is part of the greater Amazon River system, separated from the larger part of the Amazon delta by Ilha de Marajó (Marajo Island). With an estimated population of 1,402,056 people — 2,249,405, or considering its metropolitan area — is the 11th most populous city in Brazil (besides being the second largest in the North Region, second only Manaus, in Amazonas state) as well as be the 16th by economic relevance.

Founded in 1616 by the Kingdom of Portugal, Belém was the first European colony on the Amazon but did not become part of Brazil until 1775. The newer part of the city has modern buildings and skyscrapers. The colonial portion retains the charm of tree-filled squares, churches and traditional blue tiles. The city has a rich history and architecture from colonial times. Recently it witnessed a skyscraper boom. Its metropolitan area has over 2 million inhabitants.