No doubt much more accurate than this in DK much better known painting of the perpetrators riding away after the murder: https://upload.wikimedia.org/wikiped...a_Finderup.jpg
The painting is surprisingly accurate in regards to equipment of the time. And full of symbols.
The traitor skulking behind the grave.
The ravens, the bird of death, screaming.
The burning barn, torched by the devious conspirators in attempt to conceal the traces of their foul deed.
The (accurate) remoteness and bleakness of the moor where Finderup barn was located.
The magnificent harnessed horses reveals that the conspirators weren't just anybody. They were among the high and mighty of the land.
It's not unlikely that they really were fully armed and armored in chain-mail, to overcome any unexpected stand by the loyal elements of Erik Klipping's housecarls.
Even the weather is realistic. I.e. mostly grey with a patch of snow here and there, the most common sight in DK in December.
Finderup barn, was not just any barn, it was a Barn. I.e. basically a government storage facility. Such barns were often made of stone (so they were impressive buildings and were dotted all over the kingdom, providing storage of grain for harsh times and as a part of the tax collections.
Such a barn was not necessarily located near a hamlet let alone in a town.
But why would a king choose to spend the night in a barn?
Very simple: Erik Klipping was probably dog tired after a day on horseback, so instead of sleeping at the farm of a local lord, with all the commotion and social hullabaloo that entailed, he most likely opted to simply sleep in a comfortable barn with just his men.