Architectural styles are a complex of rules that characterise a building, such as a temple.
In Greece the main ones were the Doric, Ionic and Corinthian orders.
The first, and oldest, was widespread mainly in the Peloponnese region. The columns of Doric temples were very strong but also very linear and simple.
The Ionic style, widely found in Asia Minor, involved thinner columns with a large number of grooves and more decorative details.
Lastly, the Corinthian one was similar to Doric, but stood out for the large number of floral motifs (mostly designs inspired by acanthus leaves), which adorned the upper part of the column, called the capital.