Basically the monks were afraid the vikings (their biggest enemies) or any other raiders would rob them from their valuables. The viking were great traders but also good robbers. So for protection they build a tall stone structure, around the height of 25m to 40 m to be safe. There were 4 slit windows on top of the building, and a look out would look through every window to see if no one is coming, but if someone was trying to attack then he would basically ring the bell to warn everyone. The doors of the buildings were also high up so it would be hard for the enemies to get the valuables or get inside
They were built as a place of safety from raiding Vikings. When Vikings were coming, the people would take their belongings and go to the round towers and into them. The round towers had their entrances high up. After people went in, they would pull up the ladder making it difficult for the Vikings to reach them or get into the tower.
The Martello Towers were built in 1846... that is what i know :P
they were built 1966 , they collapse in 2001
They decided to build a memorial for all who died during the attacks there instead. They also built a navy ship built from all of the scrap metal from the towers
A Rochester castle has one round tower because when John 1st tried to capture it from the rebel barons he built a mine and destroyed one of the towers in order to get it back. He did get it back in the end and by this time engineers had realized that round towers had more strength then square ones because an old medieval tactic was to dig out the four corners of a square tower and it would collapse but with a circular tower there where no corners to dig out.
No, they haven't built anything in place of the twin towers yet, but that doesn't mean they never will.
Tomas ash discovered the round tower in lusk
Between the 9th and 12th centuries AD.
NO
Nantyglo Round Towers was created in 1816.
the petronas towers were built in 1998
The Martello Towers were built in 1846... that is what i know :P
it was built in 1975
it was built in 1975
The twin towers were built in 1973.
the twin towers were built by very large machinery and they also took a while to build them
no not yet
The defences of a concentric castle were round towers - It was harder for attackers to make round towers collapse. Unlike square towers they had no corners, which collapsed if holes were dug underneath the foundations.