Brameshvara Temple, (1171 AD), Kikkeri, Karnataka

 In the state of Karnataka, there are innumerable temples known for their antiquity, artistic sculptural work and architecture. Dravidian temple architecture style is visible in the fringe areas near the  Tamil Nadu border. Hoysala type of temple architecture is found in central and north Karnataka, whereas in the coastal areas at some places,  Kerala type of temple architecture is observed.

Brahmehvara (also spelt Brahmeshwara) temple is a fine 12th century old temple located in Kikkeri, Mandya district, Karnataka. It is about 10 miles from the  famous town of Shravanabelagola in Hassan district. Built in 1171 AD, in Hoysala architecture style, the temple is believed to have been built by a rich woman  named  Bommare Nayakiti during the reign of Hoysala King Narasimha I.  It is a protected monument under the control of ASI (Archaeological Survey of India)  and is being visited by lots of tourists.
Temple interior widened beyond its base, the outer walls  in a “convex shape speakzeasy.wordpress.com
Architecture of Brahmeshvara Temple is just impressive with innumerable decorative carved figures that reflect on the local skilled workers  of by-gone era and their amazing workmanship in Hoysala style that stands today as a living monument to them. It is believed the decorative figures  near  the base may be older than the Hoysala time.
Outer wall And moulding relief in Brahmeshvara temple . www.findmessages.com
Rarely seen in other temples, the striking design of this unique temple is, as you move up from the base of the building, it becomes wide, making the outer walls bulge out in a convex shape. This being a   single shrine construction (ekakuta), the bulging in the mid part is quite conspicuous; hence this simple temple draws the attention of numerous tourists. There are niches in the interior part - the navaranga and one of them has a four feet tall stone image of the Hindu god Shiva. The hall also exhibits the madanika figures - feminine sculptures  that freeze the the body features in styled forms. The beautiful carvings are  on the capitals of the pillars.
Brameshvara temple, Kikkeri by Vinaya K.H www.flickr.com  
The tower or vimana is highly decorative and has a cella. The vestibule (or ante chamber) connecting the cella to the hall has a sukhanasi - nose which is in reality, a low protruding part of the tower  over the shrine, built over the vestibule.

The large domed roof (helmet or amalaka), the kalasa over the tower and the Hoysala crest (emblem of the Hoysala warrior stabbing a lion) over the sukhanasi are  typical of  Hoysala temple architecture.  The presence of an eaves that projects about half a meter runs all around the temple and the  decorative miniature towers  on pilasters below it suggest they are much older than the Hoysala period. Below the decorative towers there are large wall images of deities and their attendants. The base of the wall, which comprises five different horizontal moldings, lies below it. A row of blocks is placed below the images. 

Ref:
https://en.wikipedia.org/wiki/Brahmeshvara_Temple,_Kikkeri