So memorable, in fact, that he has made international news.
Finding his position boring, he entertained himself by doodling.
The security guards doodles were discovered by two eagle-eyed visitors during their trip to the museum.
Since the incident occurred, the museum has assessed the damage to the painting brought on by the pen.
(The offending utensil, coincidentally, was a Yeltsin Center-branded pen.)
The incident has been classed as vandalism.
If convicted, the suspect could face a fine and up to three months in prison.
There are plans for restoration, which is estimated to cost 250,000 roubles (about $3,300).
To pass the time, he doodled on Anna Leporskaya’s painting titledThree Figures.
Here’s what the 20th-century painting looked like before the addition of his beady eyes.