Belem Tower (Torre de Belem) is situated on the northern bank of the River Tagus in Lisbon

Belem Tower (Torre de Belem) is situated on the northern bank of the River Tagus in Lisbon

In 1983, this site was listed as the UNSECO World Heritage - this tower was built at the mouth of the river to protect the entry to Lisbon port

In 1983, this site was listed as the UNSECO World Heritage - this tower was built at the mouth of the river to protect the entry to Lisbon port

Belem Tower was constructed between 1514 - 1520, during the reign of Manuel I

Belem Tower was constructed between 1514 - 1520, during the reign of Manuel I

This tower has two main parts, the medieval keep tower and a modern bulwark which contains two artillery levels

This tower has two main parts, the medieval keep tower and a modern bulwark which contains two artillery levels

A model of the Torre de Belem at display, close to the main structure

A model of the Torre de Belem at display, close to the main structure

This tower was built on a small island inside the River Tagus but after the 1755 Lisbon Earthquake, the river changed its course and now tower sits on its shore

This tower was built on a small island inside the River Tagus but after the 1755 Lisbon Earthquake, the river changed its course and now tower sits on its shore

Belem Tower is a popular tourist attraction when coming to Lisbon and on the weekend, it can get very busy

Belem Tower is a popular tourist attraction when coming to Lisbon and on the weekend, it can get very busy

During the construction of this tower, a heavily armed man-of-war ship guarded the site

During the construction of this tower, a heavily armed man-of-war ship guarded the site

This photo shows that at any given time, only 120 people can enter the Belem Tower (tower keep)

This photo shows that at any given time, only 120 people can enter the Belem Tower (tower keep)

 In 1580, Duke of Alba brought his Spanish forced and took this tower

In 1580, Duke of Alba brought his Spanish forced and took this tower

After this defeat, the dungeons of the tower served as a prison until 1830

After this defeat, the dungeons of the tower served as a prison until 1830

A gangway is connected to the drawbridge which is a sole entrance of the tower

A gangway is connected to the drawbridge which is a sole entrance of the tower

Door of the Belem Tower - this structure is built with the beige-white limestone

Door of the Belem Tower - this structure is built with the beige-white limestone

A royal coat of arms and flanked by small columns, complemented with armillary spheres can be seen at the entrance

A royal coat of arms and flanked by small columns, complemented with armillary spheres can be seen at the entrance

Looking back at the queue of people, waiting to get inside the tower

Looking back at the queue of people, waiting to get inside the tower

Inside the bulwark, artillery is placed at 17 cannon holes

Inside the bulwark, artillery is placed at 17 cannon holes

Guns were pointed out at the river to defend this vital access to the capital of Porugal

Guns were pointed out at the river to defend this vital access to the capital of Porugal

 On the ground floor bunker, the floor is inclined towards the outside to allow water to go out if it enters the tower

On the ground floor bunker, the floor is inclined towards the outside to allow water to go out if it enters the tower

This covered area opens to the bottom of the tower

This covered area opens to the bottom of the tower

A small gift shop is located inside the bulwark of the tower, where cannons are placed

A small gift shop is located inside the bulwark of the tower, where cannons are placed

There were two batteries in place, lower and the upper

There were two batteries in place, lower and the upper

At the very bottom, a dungeon was used to store for the magazine and the prison cells

At the very bottom, a dungeon was used to store for the magazine and the prison cells

The largest of magazines is accessed via a stairway on the north side

The largest of magazines is accessed via a stairway on the north side

The main façade of the fortress faces the sea but this window offers a view of the area

The main façade of the fortress faces the sea but this window offers a view of the area

Getting closer to the window and enjoying the wonderful views

Getting closer to the window and enjoying the wonderful views

The decoration of the exterior is very unique but area next to the tower is also rich in beauty

The decoration of the exterior is very unique but area next to the tower is also rich in beauty

When walking on the shores of the River Tagus, one can see this tower from anywhere in the area

When walking on the shores of the River Tagus, one can see this tower from anywhere in the area

This is the mechanism which controls the drawbrdige at the door of the tower

This is the mechanism which controls the drawbrdige at the door of the tower

On the southern side of the parapet stands an image of Our Lady of Safe Homecoming, also known as the

On the southern side of the parapet stands an image of Our Lady of Safe Homecoming, also known as the "Virgin of the Grapes"

Waters of the River Tagus seen between the walls of the tower

Waters of the River Tagus seen between the walls of the tower

From 1580 onwards a number of structures were added to the terrace with the aim of increasing its garrison capacity

From 1580 onwards a number of structures were added to the terrace with the aim of increasing its garrison capacity

Southern facade of the Belem Tower is the most richly adorned

Southern facade of the Belem Tower is the most richly adorned

This side of tower has royal symbols and archetypal elements of Manueline architecture

This side of tower has royal symbols and archetypal elements of Manueline architecture

This wooden bridge (gangway) provides access to the tower, in the background Pte. 25 de Abril can be seen

This wooden bridge (gangway) provides access to the tower, in the background Pte. 25 de Abril can be seen

At the northeast and northwest corners of the Governor's Chamber, a samall tunnel leads to the bartizans

At the northeast and northwest corners of the Governor's Chamber, a samall tunnel leads to the bartizans

Inside the tower only 120 people can visit at one time, this sign explains how the system works

Inside the tower only 120 people can visit at one time, this sign explains how the system works

Only people can come up or go down at any given time and it is controlled by a bell and red and green arrows

Only people can come up or go down at any given time and it is controlled by a bell and red and green arrows

A view from the King's Room - this room is situated next to a balcony on the tower's southern façade

A view from the King's Room - this room is situated next to a balcony on the tower's southern façade

An elegant Renaissance loggia, inspired by Italian architecture

An elegant Renaissance loggia, inspired by Italian architecture

A climb to the tower terrace is a tight squeeze on its small and narrow stairs

A climb to the tower terrace is a tight squeeze on its small and narrow stairs

Here, one can enjoy the panorama of the River Tagus and the waterfront

Here, one can enjoy the panorama of the River Tagus and the waterfront

Lisbon is written in the sands of the River Tagus's beach

Lisbon is written in the sands of the River Tagus's beach

A wonderful of the Avenida da Torre de Belém from the tower terrace

A wonderful of the Avenida da Torre de Belém from the tower terrace

Champalimaud Foundation For Av.do Rallies sits in the background of this photo

Champalimaud Foundation For Av.do Rallies sits in the background of this photo

A closer look at the building on the shores of the River Tagus

A closer look at the building on the shores of the River Tagus

These tanks were sitting at the top of the opposite bank of the river

These tanks were sitting at the top of the opposite bank of the river

I used zoom lens to capture this port in action at the mouth of the river

I used zoom lens to capture this port in action at the mouth of the river

The 25 de Abril Bridge is s suspension bridge which connect Lisbon with the municipality of Almada on the left

The 25 de Abril Bridge is s suspension bridge which connect Lisbon with the municipality of Almada on the left

This bridge was built in 1966 by the American Bridge Company

This bridge was built in 1966 by the American Bridge Company

Christ the King statue is located on the southern shores of the river and it was inaugurated on 17 May 1959

Christ the King statue is located on the southern shores of the river and it was inaugurated on 17 May 1959

Now, its time to leave the Belem Tower and it seems that it got busier at the wooden bridge

Now, its time to leave the Belem Tower and it seems that it got busier at the wooden bridge

Torre de Belem, seen from the corner while standing close to Aos Combatentes do Ultramar side

Torre de Belem, seen from the corner while standing close to Aos Combatentes do Ultramar side

Sun was trying to break out from the clouds, just above the upper terrace of the tower

Sun was trying to break out from the clouds, just above the upper terrace of the tower