Background:
While most of mainland Greece and the Aegean islands was under Ottoman control by the end of the 15th century, Cyprus and Crete remained Venetian territory and did not fall to the Ottomans until 1571 and 1670 respectively. The only part of the Greek-speaking world that escaped long-term Ottoman rule was the Ionian Islands, which remained Venetian until their capture by the First French Republic in 1797, then passed to the United Kingdom in 1809 until their unification with Greece in 1864.
While some Greeks in the Ionian Islands and Constantinople lived in prosperity, and Greeks of Constantinople (Phanariotes) achieved positions of power within the Ottoman administration, much of the population of mainland Greece suffered the economic consequences of the Ottoman conquest. Heavy taxes were enforced, and in later years the Ottoman Empire enacted a policy of creation of hereditary estates, effectively turning the rural Greek populations into serfs.
The Greek Orthodox Church and the Ecumenical Patriarchate of Constantinople were considered by the Ottoman governments as the ruling authorities of the entire Orthodox Christian population of the Ottoman Empire, whether ethnically Greek or not. Although the Ottoman state did not force non-Muslims to convert to Islam, Christians faced several types of discrimination intended to highlight their inferior status in the Ottoman Empire. Discrimination against Christians, particularly when combined with harsh treatment by local Ottoman authorities, led to conversions to Islam, if only superficially. In the 19th century, many crypto-Christians returned to their old religious allegiance.
The nature of Ottoman administration of Greece varied, though it was invariably arbitrary and often harsh. Some cities had governors appointed by the Sultan, while others (like Athens) were self-governed municipalities. Mountainous regions in the interior and many islands remained effectively autonomous from the central Ottoman state for many centuries.
When military conflicts broke out between the Ottoman Empire and other states, Greeks usually took up arms against the Ottomans, with few exceptions. Prior to the Greek Revolution of 1821, there had been a number of wars which saw Greeks fight against the Ottomans, such as the Greek participation in the Battle of Lepanto in 1571, the Epirus peasants\\\' revolts of 1600–1601 (led by the Orthodox bishop Dionysios Skylosophos), the Morean War of 1684–1699, and the Russian-instigated Orlov Revolt in 1770, which aimed at breaking up the Ottoman Empire in favor of Russian interests.[89][page needed] These uprisings were put down by the Ottomans with great bloodshed. On the other side, many Greeks were conscripted as Ottoman citizens to serve in the Ottoman army (and especially the Ottoman navy), while also the Ecumenical Patriarchate of Constantinople, responsible for the Orthodox, remained in general loyal to the empire.
The 16th and 17th centuries are regarded as something of a dark age in Greek history, with the prospect of overthrowing Ottoman rule appearing remote with only the Ionian islands remaining free of Turkish domination. Corfu withstood three major sieges in 1537, 1571 and 1716 all of which resulted in the repulsion of the Ottomans. However, in the 18th century, due to their mastery of shipping and commerce, a wealthy and dispersed Greek merchant class arose. These merchants came to dominate trade within the Ottoman Empire, establishing communities throughout the Mediterranean, the Balkans, and Western Europe. Though the Ottoman conquest had cut Greece off from significant European intellectual movements such as the Reformation and the Enlightenment, these ideas together with the ideals of the French Revolution and romantic nationalism began to penetrate the Greek world via the mercantile diaspora. In the late 18th century, Rigas Feraios, the first revolutionary to envision an independent Greek state, published a series of documents relating to Greek independence, including but not limited to a national anthem and the first detailed map of Greece, in Vienna, and was murdered by Ottoman agents in 1798.

Dussieux, Louis 1815 - 1894
Dussieux was a French Geographer, prolific during the mid 19th century. After winning prizes in competitions of the Academy of Inscriptions and Belles Letters in 1839 and 1840, he was appointed recorder of military history and geography at the Saint - Cyr Special School in 1842 and became the professor of history in 1850. In 1843 he was appointed correspondent for the Historical Monuments Committee.