<prompt> Translate the following text to EnglishKwa kuwa picha hizo zimerudishwa rangi za awali baada ya kurekebishwa kwa miaka kumi, mwangaza na ubaridi wa michoro hiyo ni wa kushangaza.  <response>: Restored to its original colors after a controversial ten-year restoration finished in 1990, the brightness and freshness of the frescoes is overwhelming. 