Excellent answer...actually your account of the arrest of the Knights Templar by King Philip of France is the correct answer.
 
In the two hundred years before they were disbanded the Templars had become an incredibly wealthy order of warrior monks during the Crusades. They were organized into three clases...the knights...the business management class ...and the servile class that worked to maintain their estates. They gained much of their wealth from the incoming members. Over two hundred years they grew from the nine founding members to several thousands. Each member that joined was required to donate his estate to the Order. Consequently, they held property interests all over Europe. Many of the entering members were from Noble Hoses and had considerable wealth to bring to the Order. They were attracted to the Order by the Order's legendary bravery. They would not leave the battle field during the Crusades until ordered to do so or victory had been attained. In they event that they were captured, they refused ransom and chose death instead. Supposedly Guy De Lusignon was a cowardly exception to the rule..

In the two hundred years of there existence they expanded their interests into the mercatile field...set up businesses...acquired a fleet of ships to set up trade routes in the Mediterranean and Atlantic coastal regions of Europe. They also became money lenders and forerunners of our modern day banking system. Therein lied the problem

Many of the Noble Houses of Europe were heavily in debt to the Templars...including King Philip the Fair of France. He decided that it was easier to have the Templars executed than to repay his debt to them. He influenced the Pope (a childhood friend of his) to declare the Templars heretics.

Each of the countries in which the Templars were active had its own master who in turn reported to the Grand Master located in France. In 1307 the King of France invited the various masters to a conference. In realty he wanted them all within the borders of France to arrest them. On Friday 13, 1307 he had all of the Templars within the Borders of France rounded up, arrested, tortured and subsequently executed. The King's debt to them also died with them.