New Delhi, Jan. 2 -- The teenage daughter of North Korean leader Kim Jong Un made her first known visit to a sacred family mausoleum, a step that experts say bolstered her status as her father's potential heir.

The visit, which occurred on New Year's Day on Thursday, even sparked speculation that the girl, reportedly named Kim Ju Ae and aged about 13, could be named a high-level official at the upcoming ruling Workers' Party congress.

Images carried by North Korea's state media on Friday showed Kim Ju Ae standing in the front row with her parents and deeply bowing at Pyongyang's Kumsusan Palace of the Sun in Pyongyang, where the embalmed bodies of her late grandfather and great-grandfather are on display.

The palace is "a place that sy...