- 1391: The future King Duarte, 'o Eloquente', is born in Viseu, son and from 1400 heir of João I and Philippa of Lancaster. A scholar-king and author of the 'Leal Conselheiro', his short reign was marked by the disastrous expedition to Tangier in 1437.
- 1886:Porto's Ponte Luís I opens
The upper deck of the Ponte Luís I over the Douro, designed by Théophile Seyrig and built by the Belgian Société de Willebroeck, is inaugurated in Porto on the king's birthday. The lower deck followed in 1888, and the two-tier iron arch became the enduring emblem of the city.