claim: In the 11,400 years since the end of the last Ice Age, sea  level has risen at an average of 4 feet/century, though it is now rising  much more slowly because very nearly all of the land-based ice that is  at low enough latitudes and altitudes to melt has long since gone."
evidence: However, that view was questioned by other researchers; the IPCC First Assessment Report of 1990 discussed the "Medieval Warm Period around 1000 AD (which may not have been global) and the Little Ice Age which ended only in the middle to late nineteenth century."