Although Ron Millonario, is headquartered in Italy (owned by Rossi and Rossi S.R.I.), the rums of Ron Millonario are distilled and aged in Northern Peru. The company website does not give us the exact location of the distillery which produces the Millonario rums although it does speak of a mid-sized Northern Peruvian distillery with three old Scottish column stills and a slow distillation process which is used to produce their rum from sugar cane molasses.
Ron Millonario XO Reserva Especial Rum is the premier rum produced by this Italian Company, and it has been one of my most favoured rums ever since I first tasted it.
Here is a link to my review of the #10 Spirit in my Rum Howler 2015 Top 100 Spirits Countdown:
#10 – Ron Millonario XO Reserva Especial Rum
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You may follow my Countdown list of the 100 Best Spirits here: The Rum Howler 2015 – Top 100 Spirit
A unique feature of the Dictador Solera System is that in addition to the younger rums being married with older rums, the barrels of similarly aged rums along one level of the solera are periodically consolidated to keep the barrels as full as possible to maintain fuller contact with the wood, and to inhibit the acceleration of the evaporation within the barrels. The Dictador 12 Year Old Rum, is a solera aged rum which is taken from the solera at the point where the average of the rum within that solera row is at least 12 years of age.
This year I took the opportunity to revisit a newer bottling of the Ron Zacapa Centenario (23 Solera) Rum as part of my Top Rums of 2014 Countdown series which I have been conducting through the month of December. My understanding based upon previous conversations with Zacapa Master Blender, Lorena Vásquez is that the flavour of the Ron Zacapa Rum varies slightly from year to year. Therefore, we may expect some differences in the rum since that last review over two years ago.
Oliver and Oliver
According to the 
The Rum Howler Blog 