The regional president of Madrid, Isabel Díaz Ayuso, has deflected criticism of a new, emergency pandemic hospital built in just over three months.
At the opening, which was boycotted by unions, Ayuso said the centre with 1,056 beds was being offered "to all of Spain".
However the national government was said to be unhappy with the 100-million-euro spend on the centre, which it has been hard to find enough staff for.
Catalan nationalists ERC criticised the "plasterboard" hospital, amid a separate political row over plans, driven by ERC, to harmonise regional tax in national budgets, cutting back Madrid tax breaks.
Ayuso hit back at the ERC saying that scrapping the Catalan spend on "pro-independence" activity would go a long way to reducing taxes in that region.