Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “internal” for attribute “rel” on element “a”: The string “internal” is not a registered keyword.
Duplicate ID “header-facility-rental”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “header-about”.
Duplicate ID “header-mission-history”.
Duplicate ID “header-the-marin-headlands”.
Duplicate ID “header-our-campus”.
Duplicate ID “header-buildings-commissions”.
Duplicate ID “header-our-impact”.
Duplicate ID “header-visit”.
Duplicate ID “header-hours-directions”.
Duplicate ID “header-project-space”.
Duplicate ID “header-the-mess-hall”.
Duplicate ID “header-our-park-partners”.
Duplicate ID “header-people”.
Duplicate ID “header-current-artists”.
Duplicate ID “header-alumni-artists”.
Duplicate ID “header-staff”.
Duplicate ID “header-board-of-directors”.
Duplicate ID “header-advisory-council-committees”.
Duplicate ID “header-public-events”.
Duplicate ID “header-upcoming-events”.
Duplicate ID “header-past-events”.
Duplicate ID “header-artists-programs”.
Duplicate ID “header-affiliate”.
Duplicate ID “header-artist-in-residence”.
Duplicate ID “header-graduate-fellowships”.
Duplicate ID “header-awards-for-artists”.
Duplicate ID “header-support”.
Duplicate ID “header-membership”.
Duplicate ID “header-award-underwriting”.
Duplicate ID “header-planned-giving”.
Duplicate ID “header-corporate-partnership”.
Duplicate ID “header-in-kind-donations”.
Duplicate ID “header-supporters”.
Duplicate ID “header-information”.
Duplicate ID “header-employment-internships”.
Duplicate ID “header-financial”.
Duplicate ID “header-press-room”.
Duplicate ID “header-contact”.
Duplicate ID “header-shop”.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “header-facility-rental” was here.
The first occurrence of ID “header-about” was here.
The first occurrence of ID “header-mission-history” was here.
The first occurrence of ID “header-the-marin-headlands” was here.
The first occurrence of ID “header-our-campus” was here.
The first occurrence of ID “header-buildings-commissions” was here.
The first occurrence of ID “header-our-impact” was here.
The first occurrence of ID “header-visit” was here.
The first occurrence of ID “header-hours-directions” was here.
The first occurrence of ID “header-project-space” was here.
The first occurrence of ID “header-the-mess-hall” was here.
The first occurrence of ID “header-our-park-partners” was here.
The first occurrence of ID “header-people” was here.
The first occurrence of ID “header-current-artists” was here.
The first occurrence of ID “header-alumni-artists” was here.
The first occurrence of ID “header-staff” was here.
The first occurrence of ID “header-board-of-directors” was here.
The first occurrence of ID “header-advisory-council-committees” was here.
The first occurrence of ID “header-public-events” was here.
The first occurrence of ID “header-upcoming-events” was here.
The first occurrence of ID “header-past-events” was here.
The first occurrence of ID “header-artists-programs” was here.
The first occurrence of ID “header-affiliate” was here.
The first occurrence of ID “header-artist-in-residence” was here.
The first occurrence of ID “header-graduate-fellowships” was here.
The first occurrence of ID “header-awards-for-artists” was here.
The first occurrence of ID “header-support” was here.
The first occurrence of ID “header-membership” was here.
The first occurrence of ID “header-award-underwriting” was here.
The first occurrence of ID “header-planned-giving” was here.
The first occurrence of ID “header-corporate-partnership” was here.
The first occurrence of ID “header-in-kind-donations” was here.
The first occurrence of ID “header-supporters” was here.
The first occurrence of ID “header-information” was here.
The first occurrence of ID “header-employment-internships” was here.
The first occurrence of ID “header-financial” was here.
The first occurrence of ID “header-press-room” was here.
The first occurrence of ID “header-contact” was here.
The first occurrence of ID “header-shop” was here.