| [A2937] | Stanisław Gabriel Tęczyński (27 March 1514 - 5 December 1561) | person | |
| [A1540] | Thales of Miletus (ca 620 BCE - ca 545 BCE) | person | represented actor |
| [A1209] | The Holy Trinity Convent in Cracow (Dominican) | corporate actor | |
| [A1567] | Themistocles (ca 524 BCE - ca 459 BCE) | person | represented actor |
| [A2888] | Jacobus Theodorus (1522/1525 - 1590) | person | |
| [A2455] | Theodosius I (Roman emperor) (11 January 347 - 17 January 395) | person | represented actor |
| [A2456] | Theodosius II (Roman emperor) (10 April 401 - 28 July 450) | person | represented actor |
| [A2457] | Theodosius III (Byzantine emperor) (died after 717 : fl. 715 - 717) | person | represented actor |
| [A1559] | Theophrastus (ca 371 BCE - ca 287 BCE) | person | represented actor |
| [A491] | André Thevet (1516 - 23 November 1590) | person | author |
| [A3366] | Jean Charles Thiébault de Laveaux | person | |
| [A1630] | Josua Thomae (fl. ca 1579 - 1581) | person | translator |
| [A2652] | Philippe Thomassin (28 January 1562 - 12 May 1622) | person | print publisher |
| [A3489] | T. Thornton (fl. 1780 - 1789) | person | |
| [A3419] | Otto Thott (13 October 1703 - 10 September 1785) | person | |
| [A2520] | Johann Jakob Thourneysen (1636 - 1711) | person | printmaker |
| [A1096] | Konrad von Thüringen (1206/1207 - 24 July 1240) | person | represented actor |
| [A2898] | Leonhardt Thurneysser (22 July 1531 - 1595 or 1596) | person | |
| [A697] | Johann Thurzo (16 April 1464 or 1466 - 2 August 1520) | person | dedicatee, publisher, represented actor |
| [A1517] | György Thurzó (26 March 1467 - 19 March 1521) | person | dedicatee, represented actor |
