Have you ever wondered how to link your building to a webpage?

With 2D barcodes you can.

A 2D barcode or Matrix code is a two-dimensional way of representing information.
It has more data representation capability then a (1-dimensional) barcode.

What is cool about a 2D barcode is that it can be read by every mobile device that has a camera and the reader software. So no special hardware required to scan a 2D barcode

You can store some formatted information on a 2D barcode. This information is in the form of an URI.

Most 2D barcode readers will send the URI encoded in the 2D barcode to the platform specific implementation.
That is why some URI’s will not been interpreted by one phone but will be by another phone.

These are some informartion you can encode in a 2D barcode:

• Link to a website.
  http:// is required, otherwise it will not know it is a website
  example : http://www.calibrate.be
• Email address
  example : mailto:newmedia@calibrate.be
• Telephone numbers
  example :  tel:+3238719962
• Contact Information based on the “MECARDâ€�
  MECARD:N:Hermans,Joris;ADR: Veldkant 31, 2550 Kontich, Belgium;TEL: +32 3 871 99 62;EMAIL:joris@calibrate.be;;
• SMS hava some few possibilities : sms or smsto
  sms:number:subject or smsto:number:subject
• Geographic information
  example : geo:40.71872,-73.98905,100
• …

The QR Code is a type of 2D barcode that you can use for free. You will find also a lot of mobile reader software for this type of 2D barcode (for example zxing).
So putting a hyperlink to the digital world on your building is easy.

building with a qrcode

If you want to play with it already you can always use a QR-Code generator like this.
And if you want to add dynamic behavior easily to it, you can always take a look at touchatag.