“The final but most important thanks is to my family who are here today and are looking forward to more of my presence over the years ahead of us,” he added.
Llyr Gruffydd will take over as interim leader of the party on Wednesday, while nominations for contenders wishing to become the next permanent leader will close on 16 June.
Mr Price also thanked Mark Drakeford, the first minister of Wales, with whom he negotiated a cooperation agreement between the Labour government and Plaid Cymru following the last election.
“Leading a party is not an easy task but it is even more difficult to lead a nation,” he said.
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“Your performance as first minister has always felt like an extended audition to become in the future Welsh republic our version of Michael D Higgins.”
There was laughter from members as Mr Price added: “It is a compliment coming from us.”
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Image: Adam Price, when he was first elected Plaid Cymru leader in 2018
Pride despite ‘painful’ resignation
The outgoing leader of Plaid Cymru, who has been in post since 2018, indicated how difficult his decision to resign had been.
“Good government needs good scrutiny and accountability is the bedrock of any democracy, not just for governments but oppositions too and that means not just seeking responsibility in others but accepting it in oneself, painful though that sometimes may be,” he said.
He ended his contribution to FMQs with a rallying cry to make the Senedd more representative of those who elect it.
“It took a long while for this gay council house boy from Tumble to have pride in himself,” he added.
“I never would have believed back then that I would get to sit in this chair.
“I want the youth of our country, women and men in equal number, every race, every creed, LGBTQ+ and disabled, the working class especially, to feel as if this place belongs to them, represents them, speaks for them as much as it does for anyone.
“I want them to see people like them occupying my chair, your chair, every chair.”
Image: First Minister of Wales, Mark Drakeford (left) and Plaid Cymru leader Adam Price outside the Senedd
Drakeford hails ‘enormous amount of agreement’
Mr Drakeford said in response: “We disagree on many things, and that’s the beauty of our democracy is that we can do that and we can do that here while knowing that behind those individual examples of disagreement, there lies an enormous amount of agreement about the purpose of politics here in Wales.”
Leader of the opposition, Andrew RT Davies, added: “I would like to thank him [Adam Price] for the courtesies he has extended to me during our time as leaders of our various groups here.
“Our politics are completely different, and I am sure he enjoyed that endorsement, but it is always good outside of the political environment where you can share a light-hearted moment.”