Antique Chinese Urn pre-Ming (?) Dynasty

My late brother-in-law bought this Chinese Urn through a reputable antique auction dealer - this urn once came with a catalog but after 20 years of moving around, the paperwork got shuffled and now lost. Please help me identify this with regard to time period and what it is called. I seemed to recall reference that it was from Ming dynasty or circa 800.

Measurement:
13" = height
7" = length
5" = width
4.5" = urn top section height

Condition/Specifications:
Material = crackled ceramics
Very good condition if from circa 800 - just one slight chip -
Crackled ceramics with carved dragons and upper base with clouds and bun feet