Another unique feature is the presence of detailed line drawings such as
the temple plan, elevation, pillars, shikhar and kalash, which have been
engraved on the rock surface. Most probably, before construction, the
architect had these drawings stencilled on the rocks nearby.

Why it was done is not clear, since nowhere else have such line drawings
been found, says Muhammad. One reason could be that Bhoja, an innovative
and experimental man, wanted to set a precedent for his grand project.
Whatever he was planning remains buried in the mists of time, since the
project could not reach completion.

Nevertheless, some of the work that Raja Bhoja left unfinished is now
being completed by the ASI. In a major conservation effort over the past
two years, Muhammad and his team have been steadily giving the temple a
facelift. The red sandstone walls have been spruced up; a missing column
has been re-created and one of the 32ft-high pillars at the entrance is
being restored to its former glory. Further, encroachments around the
temple have been removed and the area around it has been developed as a
garden.

cont'd....
http://timesofindia.indiatimes.com/India/1000_yrs_later_a_temple_gets_finishing_touches/articleshow/2964636.cms