Greece was never colonized, so the question is inapt.
Assuming the question is referring to the Ottoman Turkish Occupation of Greece, a distinction must be made between imperial territories and colonies. An imperial territory is part of the mother country and its citizens are direct citizens of the mother country with no legal distinctions, save those that might be applied in one region and not another (similar to the various states in a federation like the United States). Of course, the fundamental difference is that Greeks did not choose to be part of the Ottoman Empire and fought for nearly a century to become independent again.
The Turkish Occupation had an incredible effect on the development of modern Greece.
Economics: Probably the greatest effect was in the lack of modernization within Greece during the 1700s and 1800s. While much of Western and Central Europe was modernizing at a breakneck speed, especially with the Industrial Revolution, Greece, as an Ottoman possession "stayed still". The attempts by Greeks in the 20th century to industrialize and catch up with the remainder of Europe have had some success, but Greece's economy is still very inefficient when compared to Western Europe, especially as concerns infrastructure, resulting in Greece having consistent economic problems to this day.
Greco-Turkish Relations: As any Greek will tell you, there is no love in their hearts for Turkey, the successor to the Ottoman Empire. The two sides parted bitterly after several different wars and current disagreements over the island of Cyprus. The current problems between Greece and Turkey are a direct result of the Ottoman Empire's control of Greece.
Greek Ethno-Religious Identity: Minorities in the Ottoman Empire were recognized by their religious affiliation in the Millet System. This meant that Greeks who converted to Islam were no longer Greek, but Turkish, and conversely, in order to remain Greek, you had to affiliate with the Greek Orthodox Church and be actively religious. This has created a mindset in Greeks that being Greek is not really just an ethnicity, but also has this religious component. While being a Greek Atheist is not really an issue, being a Greek person of a different religion, especially a Greek Muslim or Greek Protestant, rubs many the wrong way. The sentiment that "to be Greek is to be Orthodox" comes directly from the Millet System.
There are 9 mainland regions in greece
!! yes
the mediterranean sea borders mainland greece ;D
Mainland Greece does not have one singular name, but is denominated by regions. Moving south to north, the regions of mainland Greece include: the Peloponnesus, Attica, Boetia, Thessaly, Epirus, Macedonia, and Thrace.
No, it is on the mainland of Greece.
Athens
Your dog
India The Mainland!!!
The Corinth Channel is located between the mainland of Greece and the Pelopponese, which is also a part of Greece, but no longer mainland since this channel was dug.
The part of Greece that is located South East of the mainland is called Crete. Crete is the most populous Island in Greece and has a mountainous terrain.
Greece IS part of the European mainland, specifically a part of the larger Balkans Peninsula.If, perhaps, the question intends to ask what connects the Peloponnesus to the Greek Mainland, it is the ISTHMUS OF CORINTH.
Mainland greece, its really, just mainland Greece which has Athens within it... then you has the Peloponnese where Sparta and Olympia are and Crete, and the islands and just other regions such as Thrace, etc.