Nu Html Checker: errori?

[enricosx]

gentilmente, avrei bisogno di aiuto
ne so 1% di html
se vado sul sito Nu Html Checker e metto di controllare il sito www.bbgallo.vicenza.it
mi compaiono vari errori che non comprendo come risolvere

Info: The Content-Type was text/html. Using the HTML parser.
Error: The character encoding was not declared. Proceeding using windows-1252.
http://www.bbgallo.vicenza.it/
Info: Using the schema for HTML with SVG 1.1, MathML 3.0, RDFa 1.1, and ITS 2.0 support.
Error: Changing character encoding utf-8 and reparsing.
From line 29, column 1; to line 29, column 67
o altro">↩<meta http-equiv="Content-Type" content="text/html; charset=utf-8">↩↩<!--
Fatal Error: Changing encoding at this point would need non-streamable behavior.
At line 29, column 67
 charset=utf-8">↩↩<!--    <met

potete aiutermi a correggerli? grazie