Danish Runic Inscription 66 or DR 66, also known as the Mask stone, is a granite Viking Age memorial runestone that was discovered in Aarhus, Denmark.

[2] The mask depicted has been explained by the Moesgård Museum as "probably intended to be protection against evil spirits".

[1] The runic text indicates that the stone was raised by four men as a memorial to a man named Fúl.

The relationship between the men is described as a félag, which was a joint financial venture between partners during the Viking Age.

⁑  kunulfʀGunnulfrGunulfʀ⁑  aukokok⁑  augutrEygautr/AuðgautrØgotr/Øþgotr⁑  aukokok⁑  aslakʀÁslakrAslakʀ⁑  aukokok⁑  rulfʀHrólfrRolfʀ⁑  risþureisturesþu⁑ kunulfʀ ⁑ auk ⁑ augutr ⁑ auk ⁑ aslakʀ ⁑ auk ⁑ rulfʀ ⁑ risþu{} Gunnulfr {} ok {} Eygautr/Auðgautr {} ok {} Áslakr {} ok {} Hrólfr {} reistu{} Gunulfʀ {} ok {} Øgotr/Øþgotr {} ok {} Aslakʀ {} ok {} Rolfʀ {} resþuGunnulfr and Eygautr/Auðgautr and Áslakr and Hrólfr raised⁑  stinsteinsten⁑  þansiþennaþænsi⁑  eftiʀeptiræftiʀ×  fulFúl/Full/Fyl,Ful/Full/Fyl,⁑  fela(k)afélagafelaga⁑  sinsinn,sin,⁑ ¶ ⁑  iaʀeræʀ⁑  uarþvarðwarþ(⁑)  …y--……×  tuþrdauðr,døþr,⁑  ⁑ stin ⁑ þansi ⁑ eftiʀ × ful ⁑ fela(k)a ⁑ sin {⁑ ¶ ⁑} iaʀ ⁑ uarþ (⁑) …y-- × tuþr ⁑{} stein {} þenna {} eptir {} Fúl/Full/Fyl, {} félaga {} sinn, {} er {} varð {} … {} dauðr, {}{} sten {} þænsi {} æftiʀ {} Ful/Full/Fyl, {} felaga {} sin, {} æʀ {} warþ {} … {} døþr, {}this stone in memory of Fúll/Fullr/Fylr, their partner, who diedþoþáþa⁑  kunukaʀkonungarkunungaʀ× ¶  barþuskbǫrðusk.barþusk.⁑  þo ⁑ kunukaʀ {× ¶} barþusk ⁑þá {} konungar {} bǫrðusk.