The Gothic fashion is a trend that appeared in the 19th century, mainly during the Victorian Era. They use complex and exotic designs and are known to be using quite a lot of black. The Goths were also one of the more powerful and fearful barbarians that sacked the superpower of Rome and is probably the only tribe that managed to repel the Huns. They contributed to the later Medieval Europe, but many historians think this is actually a different Goth. It's a pretty shit-common trend in today's time period.