Looking at our fighter, enjoing his adamantine +3 full plate, I was wondering: if your goal as a player is to get as much AC as possible, how far can you get while still on relatively low level? And so, after a bit of skimming, I came up with this buld.
Race: Tengu or Undine
Class: Druid 11/Monk 1
Stats: Wis>Dex>Everything else. Assuming standart pointbuy, base 15 Wis 15 Dex. Adding racial and level bonuses, we get 18 Wis 18 Dex.
Feats: Natural Caster, Heavy Armor Proficiency, Dodge.
Armor: Wild Darkwood full plate.
Shield: Wild Darkwood large shield.
Ring: Ring of Protection +3.
Belt of Incredible Dexterity +6.
Headband of Inspired Wisdom +6. As you can see, I placed a cap of +3 enhancement bonus on items to keep with levels. Also, most of these items you can craft yourself.
Spells: Wild shape into Large Air Elemental, Barkskin, Ironwood.
Let's count!
Base AC = 10
Wild shape natural armor => +4 AC
18+6+4 Dex => +9 AC
18+6 Wis => +6 AC
Full plate => +9 AC
Shield => +2 AC
RoP => +3 AC
Barkskin => +4 AC
Dodge => +1 AC
Size => -1 AC
Total AC = 47! And 25 touch AC! And that's not a limit!
Now just try and hit me, foe! *Foe casts lightning bolt* Oh well...
EDIT: well, I was wrong. According to http://paizo.com/paizo/faq/v5748nruor1fm#v5748eaic9tl1 you can't gain both monk's and wild armor bonuses.