- In September 1725, during the reign of Kaiser Karl VI , Roman Emperor and Archduke of Austria , the first Austrian plenipotentiaries were received in Tunisia by the Bey Hussein Ben Ali , founder of the dynasty Husseinite.
- First agreement in 1725, guaranteeing reciprocal and sustainable freedom of navigation in the territorial waters and ports and allowing Austria to establish a Consulate in Tunis.
- 23rd December 1748 under the reign of Empress Maria Theresa and Ali Bey: Conclusion of a maritime and commercial treaty which proclaimed the will of the contracting parties to deal with '' all demonstrations of perfect friendship''. Article XVII of the Treaty stipulates that '' the subjects of the Kingdom of Tunis, who, fleeing from an enemy country, took refuge in the states of his Imperial Majesty will be treated as free people and without any impediment, can safely return to Tunis, as well as the subjects of his Imperial Majesty, fleeing from an enemy country, come into the kingdom of Tunis, will be conducted at the Consulate ... ‘‘.
- On 4th January 1784 the two countries concluded a third agreement renewing treaties governing their relations of friendship.
- 1856: Conclusion of a new trade agreement between Tunisia and Austria.
- 13th January 1866: Conclusion of a treaty establishing the terms and conditions of purchase of real estate in Tunisia by Austrian subjects, in the spirit of the new Tunisian law in pre-colonial times (Fundamental Pact '' Ahd El Amane'' in 1857 and the Constitution in 1861 )
- Documents from the National Archives and the testimonies of many Tunisian historians, such as the great Clerks of State Ahmed Ibn Abi Dhiaf (1804-1874) and Hassen Hosni Abdelwahab (1883-1968), confirm the existence of more or less regular trade between the two countries, mainly through the island of Sicily and the port of Trieste which was then under Austrian rule.
- The Grand Vizier Kheireddine Pasha (1822-1890) was received in 1863 by the Emperor Franz Joseph I. Exchange of regular diplomatic correspondence between the two countries, establishment of plenipotentiary missions and delegation of Tunisian officials to Vienna.
- Tunisian Participation in the Universal Exhibition in Vienna in 1873.
- The Austro-Hungarian Empire expresses its reservation against the agreement of Bardo imposed on 12th May 1881 on Sadok Bey.
- Restoration of diplomatic relations and exchange of ambassadors in 1959, following the recovery by Austria of full sovereignty (State Treaty of 15 May 1955) and the Independence of Tunisia (Agreements of 20 March 1956).