This week we’re starting a new series in honour of the 800th anniversary of the signing of the Magna Carta in which we look back at the London of 1215. First up we take a look at the Tower of London which was a smaller version of the complex of buildings which today exists on the site.

By 1215, the Tower of London – the fortress first constructed on the orders of William the Conqueror – had already existed for more than 100 years, nestled into a corner of the city’s walls which had existed since Roman times.

Then, as now, the White Tower – initially itself known as the Tower of London, it was later dubbed the White Tower thanks to the whitewash used to cover the Kentish limestone to protect it from the weather (and for its visual impact) – stood at the heart of the complex. Unlike today’s building, it lacked the large windows which date from the early 18th century, and while the towers were believed to be capped with cones, the present cupolas date from the reign of King Henry VIII.

While it had long been surrounded by a palisade and ditch, in 1189, King Richard I’s chancellor William Longchamp, the Bishop of Ely, had begun to extend the castle’s defences while the king was on crusade (in fact, the first siege of the Tower took place in 1191 when the then Prince John did so in opposition to Longchamp’s  regime – it only lasted three days before Longchamp surrendered).

This extension, which was completed by King John following his accession to the throne in 1199, saw the size of the bailey around the White Tower doubled and a new curtain wall and towers – including the Bell Tower – built around its outer perimeter with a ditch below (the ruins of the Wardrobe Tower, just to the east of the White Tower show where the original Roman-era wall ran).

But it wasn’t until the reign of King John’s son, King Henry III, that the royal palace which now stands on the river side of the White Tower was constructed. Until that point – and at the time of the signing of the Magna Carta – the royal apartments remained within the White Tower itself, located on the upper floor.

Like those of the garrison commander known as the constable (located on the entrance level), the king’s apartments would have consisted of a hall and a large chamber, which may have been divided into smaller chambers with wooden partitions as well as a chapel (on the upper level this was the still existing Chapel of St John the Evangelist, although it would have then been more more richly decorated). Unlike the lower levels, the king’s level was of double height with a gallery (this level now has its own full floor).

The royal apartments had a variety of uses – as well as a residence and refuge for the king, they were also at times a place to keep high profile prisoners such as the Bishop of Durham, Ranulf Flambard, who was imprisoned on the orders of King Henry I (and who escaped from an upper window on a rope which had been smuggled in to him and fled to Normandy).

It is also worth noting that while King John apparently kept exotic animals at the Tower, it is his son, King Henry III who is usually credited with founding the Royal Menagerie there.

And it was his son, King Edward I, who expanded the Tower to its current size of  about 18 acres by rebuilding the western section of the inner ward and adding the outer ward.

WHERE: Tower of London (nearest Tube station Tower Hill); WHEN: 9am to 5.30pm, Tuesday to Saturday, 10am to 5.30pm Sunday to Monday; COST: £24.50 adults; £11 children under 15; £18.70 concessions; £60.70 for a family (discounts for online purchases/memberships); WEBSITE: www.hrp.org.uk/toweroflondon/.