https://en.wikipedia.org/wiki/Ranganathaswamy_Temple,_Srirangam
has the following description.
"The vimanam (shrine over the sanctum sanctorum), the Ranga vimana is shaped like omkara (om symbol) and is plated with gold."
Similar descriptions of Vimana being in Pranava shape is given for many Tamil Nadu temples.
e.g. here:
https://books.google.co.in/books?id=GTMTQLuCNSMC&pg=PA157&lpg=PA157&dq=ancient+temple+om+shape&source=bl&ots=bBvUihgOMi&sig=usYmgy4MXCL4dNcyu-HJ1DpaUSc&hl=en&sa=X&ved=0ahUKEwj9yu2QksfMAhVGk5QKHQKtAYU4ChDoAQgaMAA#v=onepage&q&f=false

On Sat, May 7, 2016 at 9:30 AM, Nagaraj Paturi <nagarajpaturi@gmail.com> wrote:
There is an interesting proposal for the Brahmi representation of Om in this conversation here:

https://www.quora.com/Ancient-India-How-was-the-symbol-OM-written-in-Brahmi-script

One Kingsley Jegan Joseph writes here :

If it was written (I haven't seen one actually written in an inscription), it would look something like this.
Inline image 1

On Sat, May 7, 2016 at 6:06 AM, Harry Spier <hspier.muktabodha@gmail.com> wrote:
I'm more than happy to forward the articles sent to me on OM but none
of them were about the representation of OM.

Harry Spier

On 5/6/16, Nagaraj Paturi <nagarajpaturi@gmail.com> wrote:
> In
>
> http://list.indology.info/pipermail/indology_list.indology.info/2016-January/042596.html
>
> Harry Spier thanked list members for sending articles on OM.
>
> Contacting him should be helpful to her.
>
> On Sat, May 7, 2016 at 12:19 AM, Nagaraj Paturi <nagarajpaturi@gmail.com>
> wrote:
>
>> Ganesh-Vidya: The Traditional Indian Approach to Phonetic Writing by L.
>> S. Wakankar has a discussion on the shape of om.
>>
>> On Sat, May 7, 2016 at 12:10 AM, Nagaraj Paturi <nagarajpaturi@gmail.com>
>> wrote:
>>
>>> There was a thread on this.
>>>
>>> This post thee:
>>>
>>>
>>> http://list.indology.info/pipermail/indology_list.indology.info/2016-January/042599.html
>>>
>>> should be useful to her.
>>>
>>> On Sat, May 7, 2016 at 12:00 AM, Corinna Wessels-Mevissen via INDOLOGY <
>>> indology@list.indology.info> wrote:
>>>
>>>> _______________________________________________
>>>> INDOLOGY mailing list
>>>> INDOLOGY@list.indology.info
>>>> indology-owner@list.indology.info (messages to the list's managing
>>>> committee)
>>>> http://listinfo.indology.info (where you can change your list options
>>>> or unsubscribe)
>>>>
>>>> ---------- Forwarded message ----------
>>>> From: Corinna Wessels-Mevissen <corinnawessels@yahoo.de>
>>>> To: "indology@list.indology.info" <indology@list.indology.info>
>>>> Cc:
>>>> Date: Fri, 6 May 2016 18:29:24 +0000 (UTC)
>>>> Subject: Early Representations of OM
>>>> Dear All,
>>>>
>>>> A colleague of mine, who is not a List member, Prof. Doris M.
>>>> Srinivasan, asks the following question on the part of a
>>>> recent Harvard PhD, who worked on the development of OM in the Vedas:
>>>>
>>>> "Does any one have knowledge and/or references regarding the imagery
>>>> (sculpture; images on manuscripts; any sort of visual renderings) of OM
>>>> from any period through the medieval period?"
>>>>
>>>> Kindly either write to her directly (dmswh@earthlink.net), to me
>>>> off-list, or to the List, of course. Thank you!
>>>>
>>>> Best wishes,
>>>>
>>>> Corinna Wessels-Mevissen
>>>>
>>>>
>>>
>>>
>>> --
>>> Nagaraj Paturi
>>>
>>> Hyderabad, Telangana, INDIA.
>>>
>>> Former Senior Professor of Cultural Studies
>>>
>>> FLAME School of Communication and FLAME School of  Liberal Education,
>>>
>>> (Pune, Maharashtra, INDIA )
>>>
>>>
>>>
>>>
>>
>>
>>
>> --
>> Nagaraj Paturi
>>
>> Hyderabad, Telangana, INDIA.
>>
>> Former Senior Professor of Cultural Studies
>>
>> FLAME School of Communication and FLAME School of  Liberal Education,
>>
>> (Pune, Maharashtra, INDIA )
>>
>>
>>
>>
>
>
>
> --
> Nagaraj Paturi
>
> Hyderabad, Telangana, INDIA.
>
> Former Senior Professor of Cultural Studies
>
> FLAME School of Communication and FLAME School of  Liberal Education,
>
> (Pune, Maharashtra, INDIA )
>



--
Nagaraj Paturi
 
Hyderabad, Telangana, INDIA.
 
Former Senior Professor of Cultural Studies
 
FLAME School of Communication and FLAME School of  Liberal Education,
 
(Pune, Maharashtra, INDIA )
 
 
 



--
Nagaraj Paturi
 
Hyderabad, Telangana, INDIA.
 
Former Senior Professor of Cultural Studies
 
FLAME School of Communication and FLAME School of  Liberal Education,
 
(Pune, Maharashtra, INDIA )