If page is static - engrave it in a titanium plate, possibly as a QR code of sorts and pass it through generations. Include instructions for reader to publish it to whatever media analog of today's web page. So basically stay away from technology, get information encoded into lowest and most resilient physical material and rely on future generation to publish and/or update it's content.
QR code? I think many are really underestimating the amount of change in 500 years.
Sure, QR codes are unlikely to be useful in 500 years, but if they have the above properties, they are just as good as anything else. If civilization endures, I am sure they'll be decodable in 5 centuries (whether they are preserved is altogether another matter).