Determining the oldest floor in the world is difficult, as many ancient floors have been lost to time or destroyed by natural disasters or human conflict. However, there are a few contenders for the title of oldest floor.

One of the oldest known floors is located in the ancient city of Jericho, which is believed to be the oldest continuously inhabited city in the world. The floor is made of plaster and dates back to around 8,000 BCE. It was discovered in the ruins of a house that had been abandoned and then rebuilt several times.

Another contender for the oldest floor is located in the ancient city of Pompeii, which was destroyed by the eruption of Mount Vesuvius in 79 CE. The floor is made of small, colorful tiles and dates back to the 2nd century BCE. It is located in the House of the Faun, one of the largest and most impressive houses in Pompeii.

There are also several ancient floors located in the Middle East that are believed to be some of the oldest in the world. One example is the floor of the Temple of Bel in Syria, which dates back to around the 1st century CE. The floor is made of marble and features intricate geometric patterns and designs.

In conclusion, while it is difficult to definitively determine the oldest floor in the world, there are several contenders that date back thousands of years. These floors are not only fascinating examples of ancient craftsmanship, but also provide insight into the daily lives of our ancestors.