If you think about it, castles took a lot of time (years), effort and money to build, so there would have to be a good reason to place them 'correctly'. (I'm assuming you're not referring to the quick, simple motte and bailey castles which were made of wood and built quickly (although often they were the where the later stone castle was built).
A castle existed for two main reasons.
1. At first, it needed to control the surrounding countryside. Therefore, it housed a small army (or was able to feed and water one). So it was often sited on a hill, by a river, or with easy access to a main highway.
2. It was for protection of the lord (and his family) in areas where other, powerful forces could attack. The peasantry had few weapons and were no real threat. But tribes living over the border (Scots!?) could be a threat, hence the need for protection or to act as a base for counter-raids.
A third reason developed out of the first two. As things became quieter, so the castle became an economic center. A town grew up around it and it grew and grew.
Of course, there is also the fact that a sufficiently rich lord could build a castle simply to show how powerful and wonderful he was, but that is really the same as reason 1: the need for control.
a castle
very creepy
Power and protection.
there are over 60 types of castle in ireland
england has the most castles or scotlend
Yes.
The first stone castles in Ireland were built by the Normans during the late 12th century, following their invasion of Ireland in 1169. They constructed these fortifications primarily for military defense and to exert control over the local population. Notable examples of early Norman castles include the castles at Dublin, Trim, and Carrickfergus. The introduction of stone castles marked a significant shift in Irish architecture and feudal society.
They are not specific castles. The emblem is meant to represent the strength and defiance of Dublin and its people.
WikiAnswers does not show pictures, sorry.
The harp is the official symbol of Ireland. The shamrock is a common symbol used to represent Ireland, though not the official one. Green can represent Ireland. The sports of Gaelic Football and Hurling, Ireland's two national sports, can represent Ireland. St. Patrick's Day events, like parades, can represent Ireland. These are some of the things, but there are others, like music.
12 MEPs represent the Republic of Ireland. 3 MEPs represent Northern Ireland. See the related question below.
Introduction of the English to Ireland and stone fortifications for e.g. castles etc