The EU bigwig spoke with British Prime Minister Theresa May today at the Chancellery in Berlin as part of talks with outgoing US President Barack Obama and other European leaders.
A conspiracy theory surfaced earlier this year of a secret society within the EU after a number of senior leaders were photographed making the sign, which is allegedly used by members of the mythological illuminati.
Others photographed using the hand sign in the rhombus shape have included Mrs May herself, and European Commission President Jean Claude Juncker.
The sign is often referred to as a Merkel Diamond, due to her frequent use of it.
Mrs May was snapped imitating the ‘Merkel diamond’ while giving a speech outside the Palace of Westminster on July 11.
Conspiracy theory website illuminatiRex lists the diamond sign as number one out of a top-ten of illuminati signs, with Mrs Merkel given her own section for doing it in reverse, in what it describes as the Merkel Raute.
And on the conspiracy theory forum run by David Icke, the significance of the Merkel Diamond, which has been used in political poster campaigns, has been discussed.
A senior forum member with the user name Posidon posted: “I don’t know if any one even notice the Angela Merkel famous hand sign?
“I found today a new picture of it in my local newspaper, and I found curious that they use her hand sign in a political campaign.
“They call it the famous ‘diamond’.
“Diamond they say? So I ask, is every one asleep these days?
“Just the first time I saw the image, I noticed it is not a diamond at all, plus the way she placed her fingers (which is not even easy) unless you really want them to be that way does not resemble a diamond at all, but a Masonic symbol of the compass and square.
“Is every one asleep? No one sees and talks about these things, is it not evident enough?”
When Mrs May used the symbol earlier this year, Twitter users immediately drew comparisons between May and Merkel and questioned the significance of the “code”.
But, Mrs Merkel, who has led the Christian Democratic Union party for 16 years, explained the reason she makes the unusual gesture in a 2013 interview, and denied there was anything sinister behind it.
She told a German magazine: “There was always the question, what to do with your arms, and that’s how it came about. It contains a certain symmetry.”
Other famous faces including Gordon Brown, the Duchess of Cornwall and Recep Tayyip Erdogan have also been spotted making the ‘Merkel diamond’.