The central position of Ljubljana and its dialect had crucial impact on the development of the Slovenian language. It was the speech of 16th century Ljubljana that Primož Trubar a Slovenian Protestant Reformer took as a foundation of what later became standard Slovenian language, with a small addition of his native speech, the Lower Carniolan dialect. While in Ljubljana, he lived in a house, on today's Ribji trg, in the oldest part of the city. Living in Ljubljana had a profound impact on his work; he considered Ljubljana the capital of all Slovenes, not only because of its central position in the heart of the Slovene lands, but also because it always had an essentially Slovene character. Most of its inhabitants spoke Slovene as their mother tongue, unlike other cites in today's Slovenia. It is estimated that in Trubar's time around 70% of Ljubljana's 4000 inhabitants attended mass in Slovene. Trubar considered Ljubljana's speech most suitable, since it sounded much more noble, than his own simple dialect of his hometown Rašica. Trubar's choice was later adopted also by other Protestant writers in the 16th century, and ultimately led to a formation of a more standard language.