20th century 4,952 1974- 2,279 19th century 2,124 1900-1999 1,618 21st century 1,421 Period of discoveries, 1385-1580 1,232 16th century 1,123 18th century 1,121 1933-1974 1,110 1910-1974 1,038 17th century 915 Since 1974 714 1800-1899 710 Revolution, 1974 704 1816-1826 613 To 1385 506 1889-1970 476 20e siècle 432 Early works to 1800 402 To 1500 370 1900 - 1999 369 2000-2099 352 1385-1580 347 1789-1900 331 John VI, 1816-1826 308 1700-1799 288 1910-1926 285 Spanish dynasty, 1580-1640 277 1500-1599 274 1828-1834 270 1826-1853 269 1763-1822 254 1933- 247 1800-1999 224 1918-1974 223 1526-1765 211 Revolution, 1961-1975 208 1699-1782 207 Miguel I, 1828-1834 204 711-1516 202 Revolution, 1640 202 Modern, 1580- 187 Maria I, 1777-1816 185 To 1822 185 1600-1699 171 Joseph, 1750-1777 157 John IV, 1640-1656 156 21e siècle 153 1900-2099 146 Since 1900 137 15th century 136 Classical period, 1500-1700 131 1974 125 1554-1578 124 1802-1866 123 1394-1460 122 1889-1908 120 To 1580 120 Revolution, 1820 119 Revolution, 1910 119 1767-1826 116 19e siècle 115 1469-1524 114 1385 - 1580 105 1500-1699 105 Sebastião, 1557-1578 105 1798-1834 104 1777-1816 103 1888-1935 102 John II, 1481-1495 102 John V, 1706-1750 101 John I, 1385-1433 100 1861-1889 99 Manuel I, 1495-1521 98 1952- 96 Revolution, 1963-1974 94 16e siècle 93 Revolution, 1964-1975 92 Sebastião, 1557-1578 92 1455-1495 91 1580-1640 91 1750-1777 89 1700 - 1799 88 1975- 87 1900-1910 86 Empire, 1822-1889 85 1469-1521 83 1608-1697 83 1906-1980 83 1834-1853 82 To 1975 82 1524?-1580 81 1945- 79 Modern period, 1500- 79 1714-1777 78 Afonso VI, 1656-1683 78 1918- 77 1800 - 1899 76 70-1789 76 17e siècle 75