who built it?
It is speculated that they were built by invaders.
Maiden Castle, Dorset
Hill forts developed in the Late Bronze Age and Early Iron Age, roughly the start of the first millennium BC. The reason for their emergence in Britain, and their purpose, has been a subject of debate. It has been argued that they could have been defensive sites constructed in response to invasion from continental Europe, built by invaders, or a military reaction to social tensions caused by an increasing population and resulting pressure on agriculture.

Since the 1960s, the dominant view has been that the increasing use of iron led to social changes in Britain. Deposits of iron ore were located in different places to the tin and copper ore necessary to make bronze. As a result, trading patterns shifted, and the old elites lost their economic and social status. Power passed into the hands of a new group of people.
approximately in which century or in which year was the maiden castle in dorset built? Around 600 BC who was the architect for this structure? UNANSWERABLE
wiki:5265005
Maiden Castle, Dorset [SEP] First hill fort
Hill forts developed in the Late Bronze Age and Early Iron Age, roughly the start of the first millennium BC. The reason for their emergence in Britain, and their purpose, has been a subject of debate. It has been argued that they could have been defensive sites constructed in response to invasion from continental Europe, built by invaders, or a military reaction to social tensions caused by an increasing population and resulting pressure on agriculture. Since the 1960s, the dominant view has been that the increasing use of iron led to social changes in Britain. Deposits of iron ore were located in different places to the tin and copper ore necessary to make bronze.