Our building was constructed in 1790 and later added onto in the late 1960s. Quite attrative. It was later bought and completely rehabbed by someone a few years prior to me purchasing the building. They made the unfortunate error of foaming the entire building for insulation and failed to run any conduit to encapsulate LAN wiring. ALL electrical and networking wires are foamed in place. This has caused problems for us as we can't upgrade anything. We can't fish a line b/c everything is hard foam insulated. It's the only downside of owning this building. So, that in a nutshell is why I can't run a LAN from downstairs in the basement where our network is located, to my personal office on the 2nd floor. It's been an issue since I bought the building last year and we still haven't found an acceptable work around.
Bill