Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Attribute “xmlns:og” not allowed here.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
Bad value “(min-device-width: 48em) and (max-device-width: 64em) and (orientation: landscape)” for attribute “media” on element “link”: Expected a CSS media feature but saw “min-device-width” instead.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Start tag “body” seen but an element of the same type was already open.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Stray end tag “span”.
End tag “td” seen, but there were open elements.
Unclosed element “span”.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “font” element is obsolete. Use CSS instead.
Bad value “682px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “82px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Bad value “main
/architecure.jpg” for attribute “src” on element “img”: Tab, new line or carriage return found.
Stray end tag “abbr”.
No “li” element in scope but a “li” end tag seen.
Duplicate ID “main-navigation”.
Unclosed element “font”.
Bad value “name” for attribute “type” on element “input”.
Attribute “required” is only allowed when the input type is “checkbox”, “date”, “datetime-local”, “email”, “file”, “month”, “number”, “password”, “radio”, “search”, “tel”, “text”, “time”, “url”, or “week”.
Attribute “placeholder” is only allowed when the input type is “email”, “number”, “password”, “search”, “tel”, “text”, or “url”.
Bad value “phone” for attribute “type” on element “input”.
Bad value “query” for attribute “type” on element “input”.
The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
Stray end tag “div”.
Element “marquee” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “footer” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Bad value “” for attribute “src” on element “script”: Must be non-empty.
The “clear” attribute on the “br” element is obsolete. Use CSS instead.
Bad value “#” for attribute “onclick” on element “span”: illegal character
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “main-navigation” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.