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The Manueline reform
Decisions of King João II

D. João II

In Portugal, in 1487, King João II asked the Lisbon City Council and the representatives of the guilds to give their opinions about the idea of using a single type of mark for all of the products (“either the mark of Cologne or the Marçaria mark”) and a new system of weights, with arráteis of 2 marks or 16 ounces. Shortly thereafter, the king decided that the system of weights should be based on the mark of Cologne.

Meanwhile, the king died without making any other decisions regarding the standardization of the system.

Further information​
António Neves: aneves@ipq.pt
Museum of Metrology: museu.metrologia@ipq.pt