"The main building of The Lomonosov Moscow State University WAS constructed BETWEEN 1949 AND 1953, and had been being the highest building in Moscow until the apartment complex “Triumph-Palace” was built in 2003". *'had been being' is not very commonly used grammar. You can almost always use something simpler like 'was' I understand, but you can just was 'was being'. Or 'At this time it was under contraction'. I had been being followed for two days. OR I had been followed for 2 days. The meaning is basically the same.