MESZL Boulevard Library, Teréz körút 2-4.  

Source: fortepan.hu

György Mocsonyi had the apartment house built, the plan was drawn up by Donát Voita. It was constructed from 1871 to 1874 in an eclectic style. Originally it had three floors, however, in 1929 it was extended by two more floors. The extension was commissioned by the widow of Count Rudolf Bissingen-Nippenburg as per plans drawn up by Károly Rainer.   

Source: budapest100.hu

In 1935, the shop called ERMA moved into the ground floor. The shop has been established by two young girls, Erzsébet Herzmann (Elizabeth Herzmann) and Mariska Goldberger. The name of the shop was the fusion of the first two letters from the two girls' first names: ERMA. The original shop has been operating since 1922 on József körút (Joseph Boulevard), but as the shop outgrew the place, the girls decided to search for a bigger one close to the more fashionable Andrássy road.

That's how they found the large business premises of the bankrupt restaurateur, Jakab Neiger*. Pál Rákos was contracted for the reconstruction: the goal was the creation of a spacious and tall hall, where the customers could admire the curtains and textiles in natural light. For this, Béla Székely, master builder, had to take out many support pillars, using a new technique. The shop brought new colour to the city. It got a separate feature in the architectural paper Tér és Forma (Space and Shapes):

"The shop- and storefront-builder of the current age puts emphasis on keeping the simple shapes while exhibiting the wares in an attractive manner. The difference between the shop-fronts of the past and the present is that the goal of the storefront has changed, becoming one large glass front, which gives an unobstructed view of the shop itself." (The shop managed to keep this enormous glass front to this day - even with multiple reconstructions.)  

Source: retronom.hu

The ERMA was considered a well-known needle-craft shop all over Europe in the years before World War II. Here customers could find men's and women's clothing, knitwear and woven clothing, and even blouses with Hungarian-style embroidery on. The shop had delivery and free consultation services. It had significant export, as well.  

The shop survived the destruction of World War II, but was only able to provide a small variety of quality goods. For a long time, ERMA operated as a store of Röltex. The neon sign is still on the building, reminding passers-by of the great history of its shop.  

The house, which has two entrances and two inner courtyards, was hit in 1956, destroying the middle section.  

Source: Hungaricana

After the renovations, the ground floor was occupied for many decades by a radio and electrical store (later called KERAVILL).   

With one more reconstruction, on the 1st of September 2021, the Boulevard Library, a new branch library of the Metropolitan Ervin Szabó Library,  opened its doors.  

Source: FSZEK

Source of text: retronom.hu
*Corrected from Jenő Neiger: as per Vendéglősök Lapja 1922 (Volume 38 Issue 1) - editor