[Neil Gagel]

Again, not necessarily medieval, but think of the assassination of Julius Caesar - buncha pissed off senators with knives. Really, I think that realistically in most intances assassination is a tool that people use, not a profession that people follow. Obviously there are exceptions - like the Hashashin and the Thuggee, but they are anomalies I think.

When I think of assissinations in medieval times I think of a poisoned cup (Borgia's of Italy come to mind), or a gang of rowdy types that just brutally massacre their targets (murder of Thomas a Beckett, as pointed out earlier) - not of the Assassin's Creed style cloaked man sneaking around in the night with dagger in hand.

[Toke Krebs Niclasen]

Or perhaps at a lower social level, a few thugs hired to arrange a deadly bar fight.

[Craig Peters]

It often took months for the real life assassins to worm their way into the confidence of one of their targets. Yes, it's true that some of their assassinations were quick, but often they were also more protracted affairs, requiring time and effort. So the main clothing they would wear would look like everyone else's, or be appropriate for whatever disguise they had adopted.

[A Visser]

A nice example of this is one of the most well known murders in Dutch history. It concerns the murder of prins Willem van Oranje (prince William of Orange) on the 10th of July 1584. The murderer Balthasar Gerard, first had himself employed by the prince to get close to him. Then on the 10th of July he shot him at point blank range while the prince was coming down the stairs. (There are still two bullet holes in the wall). He died on the spot. Gerard was caught, tortured, quartered and beheaded. (his family still was rewarded by the Spanish king).

An other political murder was that of Floris V count of Holland on the 27th of June 1296. By order of Edward I Floris was taken hostage by a few Dutch noblemen. When they wanted to transport him to England they encountered a group of people who demanded his release. In respond to this, one of Floris' captors Gerard van Velzen rode back toward Floris who sat bound on a horse, drew his sword and killed Floris. He alone was caught and put to death. the others lived their lives in exile.

So, you could either be murdered by a real assassin or by one of your peers. But in both cases the murderer didn't live a long and happy life. They suffered an extremely painful end.
And also.....in both cases no special uniform....

[Ben P.]

This guy might be of some help:

http://www.thearma.org/essays/Fabris_the_Assassin.htm