Alternative Past

An anime that takes place in an alternative past is an anime that clearly does not belong to the future or the present, and isn't tied particularly closely to our history, or has ties to our history but only as a premise: there are too many things that don't make sense for the time-period. In some cases there is futuristic technology present, but the overall setting still feels that of the past. However the setting must still take place on Earth, since we can not know if the history of a fantasy world is an alternate one or not.