Image: Vishnu with Demons

Image Source: Wikipedia. Vishnu with Demons Madhu and Kaitabha

Image: Rama Battles Demons

Rama in Combat

circa 1790

(Asian Art Museum of San Francisco)

While Rama battles Ravana's rakshaka army, Ravana waits in the golden city of Lanka.

Details:

Image: Gods and Demons

Domain of the gods and the demons

(Ramayana, circa 1800: Huntington Archive)

You can read more about rakshasas at Wikipedia.

Detail (Ravana?):

Shiva and Parvati:

Image: Capture of Demons in Lanka

Rama and Lakshmana outside Lanka

Kangra painting, circa 1800

(Walters Art Museum)

More about the kingdom of Ravana at Wikipedia.

From the Museum's website: With the help of his army of monkeys, Rama's invasion of Lanka is successful. Rama and his brother Lakshmana are depicted seated under a tree at left, as monkeys bring captured demons to them. The palace of the demon-king Ravana stands on the hill at top right in this illustration from the "Ramayana."

Detail:

Image: Awakening Kumbhakarna

The Awakening of Kumbhakarna 

illustrated manuscript, circa 1605

(Metropolitan Museum of Art NYC)

In the foreground, you see Rama's camp with his army of monkeys and bears, while in the city of Lanka the rakshasas are trying to wake the giant Kumbhakarna. You can read more about Kumbhakarna at Wikipedia.

Here are some details from the illustration:

Image: The Fall of Kumbhakarna

The Fall of Kumbhakarna.

Painting by Sahib Din, 1652.

(British Library at Flickr)

Details:

More about Kumbhakarna at Wikipedia.

Rama shoots Kumbhakarna.

Vibhishana, Kumbhakarna's brother, grieves. 

Notice that as Kumbhakarna crashes to the ground, 

he pulls down part of the walls of the city of Lanka with him.

The rakshasas flee, terrified of what will happen next.

Image: Atikaya and the demons battle Rama's army

Image source: Atikaya and the demons battle Rama's army

Detail: