Nodar Kancheli's Basmanny market building collapsed yesterday, killing 47 people, nearly a year to the day after his Transvaal Park building fell down, killing 28.
The architect is now under investigation by the Russian authorities over the poor design of the two structures.
A Russian official said: 'He was questioned in connection with [our] investigation.
'We are planning to interrogate him in the future depending on the results of further investigation.'
But the architect has hit back, claiming that the latest accident could have been caused by poor maintenance of the building or by an excessive amount of 'snow on its roof'.
In addition to the deaths, at least 27 people were injured in yesterday's collapse. The authorities have now called off their search for survivors.