Tyre was a prosperous and magnificient city. If we studied Ezekiel 27 (http://www.biblegateway.com/passage/?search=eze27&version=31), we know that Tyre was strategically located at the gateway of sea and a center of trade in ancient time. Tyre was a city filled with abundance of goods, skilled sailers, craftmen, builders, merchants, and protected with a strong military force. The prosperity and its magnificience could still be reflected by its archological remains (see http://www.middleeast.com/tyre.htm).

  However, at the later part of Ezekiel 27, we see the "shipwreck" of the city anounced by God through the prophet Ezekiel:

27 Your wealth, merchandise and wares,
       your mariners, seamen and shipwrights,
       your merchants and all your soldiers,
       and everyone else on board
       will sink into the heart of the sea
       on the day of your shipwreck.

  What happened? Were the magnificience and prosperity of the city the cause of its downfall? In a way, these good attributes could become the stumbling block of its downfall. As a matter of fact, we can see a hint of its downfall by studying the beginning verses of the prophecy (Ezekiel 27 3b):

" 'You say, O Tyre,
       "I am perfect in beauty."

   Do you see the symtom of its downfall, namely, Pride? The city (its kings and people), see itself perfect in beauty. This leads me to recall an antithetical teaching in the sermons on the mount delivered by the Lord (Matthew 5:3):

3"Blessed are the poor in spirit,
      for theirs is the kingdom of heaven. 
 

Let's continue with next chapter and see a bit more.