Irish Guard / Her Majesty’s Royal Palace and Fortress, more commonly known as the Tower of London
Σταύρος posted a photo:
Irish Guards stand outside the Jewel House (Tower of London)
Bearskin Cap:
A bearskin is a tall fur cap, usually worn as part of a ceremonial military uniform. Traditionally, the bearskin was the headgear of grenadiers, and is still worn by grenadier and guards regiments in various armies.
Four Buttons:
The Irish Guards have buttons arranged in groups of four as they were the fourth Foot Guards regiment to be founded, reflecting the regiment’s position as the fourth most senior Guards regiment, and the collar is adorned with a shamrock on either side.
The Irish Guards (IG), part of the Guards Division, is a Foot Guards regiment of the British Army.
Along with the Royal Irish Regiment, it is one of only two purely Irish regiments remaining in the British Army. The Irish Guards recruit in Northern Ireland, the Irish neighborhoods of major British cities, and in the Republic of Ireland (which permits its citizens to enlist in the British or any other forces, but forbids active recruiting.)
Irish Guards officers are often drawn from British public schools, particularly those with a Roman Catholic affiliation, such as Ampleforth College, Downside School and Stonyhurst College. Catholic foreign royals or aristocrats, even those with no Irish connection, for example Jean, Grand Duke of Luxembourg during World War II, have found a home in the Irish Guards.
One way to distinguish between the five regiments of Foot Guards is the spacing of the buttons on their tunics. The Irish Guards have buttons arranged in groups of four as they were the fourth Foot Guards regiment to be founded. They also have a prominent blue plume on the right side of their bearskins.