What Place was Jesus going to prepare In John 14 Jesus tells the disciples that he was going to prepare a place for them. Isn't it that heaven was already founded from creation?  So, what place was he referring to? Was this just a figure of speech?
Technically, I don't know of any place in the Bible that says that the saved go to Heaven when they die. It says they go to "paradise", that they go to be "with Jesus", etc, but I don't know any verse that says this is Heaven. Exactly what the place where the saved go is called is not entirely clear.

Perhaps the place that Jesus went to prepare is the New Jerusalem of Revelation.

Or if it is the same Heaven mentioned throughout the Bible, this would not really cause a problem with this verse. To "prepare" a place does not necessarily mean that you are creating it from nothing. He might have meant that he was preparing Heaven to receive the saved. Like someone might say, "Oh, I have to get home to prepare the house for the party tonight." They don't mean that they're building a new house, but that they are going to decorate their existing house, arrange furniture, put out clean towels, etc.