From About.com, this site offers a list of updated links to sites on ancient Greek history. A good place to start your research.
The Classical Period
This site is focused on art and offers a short description of art in various periods of Greek history.
From Thomas R. Martin, An Overview of Classical Greek History from Homer to Alexander. A part of the excellent Perseus Project, this resource is linked to other relevant information.
An excellent resource for a study of Greek Architecture. Offers short descriptions and images of various architectural elements and places.
civilization history chronology.
A concise well designed timeline.
OF GREECE: General Information
General information on different periods from Greek history, including the Classical period.
The McGraw-Hill Companies, Inc..